The energy of an object as it is in motion is defined as Kinetic energy.
Explanation:
The energy that is attained by an object when it is moving is called as Kinetic energy. It is the amount of energy that is essential for inducing an acceleration in an object and making it to displace from its idle position to the destination. When an object attains the acceleration it can have this kinetic energy until there is a change in the speed of the object with which it moves.
The forms of energy changes and it can take any form like thermal, electrical, electromagnetic,etc. Potential and kinetic energy are the two things under which these forms are energy are grouped. There can be a transferring of Kinetic energy from one object to another. The kinetic energy can also take any form of energy.
if a mint is on a turn table that is rotating at 34 RPM’s, and is 23 (cm) away from the center of the record, what is the Tangential Acceleration?
Answer:
The tangential acceleration is zero
Explanation:
Tangential Acceleration
It's a measure of how fast is the tangential velocity changing when the object has rotational motion. It's perpendicular to the centripetal acceleration and equal to the product of the angular acceleration by the radius of rotation. In a uniform circular motion, the angular speed is constant, i.e. the angular acceleration is zero.
If the tangential acceleration was different from zero, the rotating object would change its angular and tangential velocities.
The turntable is rotating at a constant speed, so, regardless of the position of the mint, its tangential acceleration is zero
What acceleration will result when a 12 N net force applied to a 3 kg object? A 6 kg object?
Answer:
4m/s², 2m/s²
Explanation:
F = 12 N
m = 3kg
a = ?
F = ma
a = F/m = 12/3 = 4 m/s²
when m = 6kg
a = F/m = 12/6 = 2 m/s²
Using Newton's second law, the acceleration for a 3 kg object with a 12 N net force is 4 m/s^2, while for a 6 kg object it is 2 m/s^2.
Explanation:The acceleration of an object with a mass of 3 kg or 6 kg can be determined using Newton's second law of motion., which can be stated as: The acceleration (a) of an object is equal to the net force (F) applied divided by the mass (m) of the object, which can be written as a = F/m. In your problem, with a 12 N net force, for a 3 kg object, the acceleration would be 4 m/s^2 (12 N / 3 kg), while for a 6 kg object, it would be 2 m/s^2 (12 N / 6 kg).
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A species is defined as organisms capable of interbreeding and producing fertile offspring. Diane Dodd examined the idea of speciation in fruit flies. She took fruit flies from a single population and divided them into separate populations living in different cages, each receiving different food sources. One group was given maltose-based foods and the other, starch-based foods. After many generations, the flies were tested to see which flies they preferred to mate with. Dodd found that "maltose flies" preferred other "maltose flies.” In this case, what lead to speciation?
Answer:
The separation of the single population (allopatric speciation) led to speciation.
Explanation:
"Speciation" refers to the evolutionary process of organisms in order to become a "distinct" species. There are several factors affecting speciation and these are: Genetic Drift, Natural Selection, Mutation and Geographic Isolation.
The situation above is an example of the factor called "Geographic Isolation." This type of isolation is reproductive in nature. This happens when organisms are separated or divided by a barrier. In the case above, the fruit flies were divided into different cages. One cage was for fruit flies who fed on maltose-based foods, while the other cage was for fruit flies who fed on starch-based foods.
More specifically, this case may also be referred to as "allopatric speciation." It happens when a single population is divided. Thus, over time the separated species acquire genetic differences. These differences prevent them from breeding with each other once they are reunited. This is the reason why the maltose-based flies prefer to mate only maltose-based flies as well.
Answer: Habitat isolation
Explanation: I just guessed
The work done on a box is 532 joules. The force applied to the box was 48 N. What was the displacement of the box? *
Explanation:
Work = force × displacement
532 J = 48 N × d
d ≈ 11 m
In the figure, a weightlifter's barbell consists of two identical small but dense spherical weights, each of mass 50 kg. These weights are connected by a thin 0.96-m rod with a mass of 24 kg. Find the moment of inertia of the barbell through the axis perpendicular to the rod at its center, assuming the two weights are small enough to be treated as point masses.
The moment of inertia of the barbell can be calculated by treating the weights as point masses using the formula I = 2mR², and the moment of inertia for the rod using the formula I = (1/12) × M × L². Add these together for the total moment of inertia.
Explanation:The student’s question concerns the calculation of the moment of inertia of a weightlifter's barbell through an axis perpendicular to the rod at its center. Given that the barbell consists of two spherical weights, each with a mass of 50 kg and connected by a 0.96-m rod with a mass of 24 kg, we can use the formula I = 2mR² to find the moment of inertia assuming the masses can be treated as point masses.
The distance R from each weight to the center axis is half the length of the rod, which is 0.96 m / 2 = 0.48 m. Therefore, the moment of inertia for the two weights would be:
I₁ = 2 × 50 kg × (0.48 m)²
Separately, the moment of inertia for the rod can be calculated with the formula I = (1/12) × M × L², where M is the mass and L is the length of the rod. For the 0.96-m rod having a mass of 24 kg, the calculation would be:
I₂ = (1/12) × 24 kg × (0.96 m)²
To find the total moment of inertia for the entire barbell, we combine the moments of inertia of the weights (I₁) and the rod (I₂).
If the sine of an angle is 4/7 what is the cosine of its complement.
Answer: 0.57
Explanation:
Let's begin by explaining that two angles are complementary when they sum is [tex]90\°[/tex]:
[tex]\theta + \alpha=90\°[/tex]
Having this clear, let's find [tex]\theta[/tex] from the following trigonometric function:
[tex]sin \theta=\frac{4}{7}[/tex]
[tex]\theta=sin^{-1} (\frac{4}{7})=34.84 \°[/tex]
Now that we have the value of [tex]\theta[/tex], let's find [tex]\alpha[/tex]:
[tex]\alpha=90\°-\theta[/tex]
[tex]\alpha=90\°-34.84 \°[/tex]
[tex]\alpha=55.15\°[/tex] This is the complement of angle [tex]\theta[/tex]
Then, the cosine of the complement [tex]\alpha[/tex] is:
[tex]cos \alpha=cos(55.15\°)[/tex]
[tex]cos \alpha=0.57[/tex] This is the answer
Which of the following is not a possible environmental consequence of urban sprawl?
A)
deforestation
B)
pollution
C)
loss of natural resources
D)
decrease in water quality
E)
none of the above
All options provided (deforestation, pollution, loss of natural resources, and decrease in water quality) are possible environmental consequences of urban sprawl, making the correct answer 'none of the above'.
The question, "Which of the following is not a possible environmental consequence of urban sprawl?" explores the impact of urban sprawl on the environment. Urban sprawl, which refers to the spread of a city and its suburbs over more and more rural land at the periphery, leads to several negative environmental impacts. These include deforestation, as forests are cleared to make way for new developments; pollution, both from increased vehicle emissions and construction activities; loss of natural resources, as land that could be used for agriculture or that serves as natural habitats is consumed for development; and a decrease in water quality, due to increased runoff and pollution entering water bodies. Therefore, the correct answer to this question is E) none of the above, as all the options listed are potential consequences of urban sprawl.
A cart rolling down an incline for 5.0 seconds has an acceleration of 4.0 m/s .If the cart has an initial speed of of 2.0 m/s ,what’s its final speed.
Applying
v=u+a.t
(all the symbols are bearing their conventional meaning)
Here,u=2ms−1,t=5,a=4ms−2
So,v=2+4⋅5=22ms−1
Mark as BrainliestAnswer:
22m/s
Explanation:
V = u + at
= 2 + ( 4x5)
= 2 + 20
= 22m/s
PLZ HELP ME 3 MIINS 50 POINTS AND BRAINLEIST
Juan uses a lever to lift a rock. He places the rock on the short arm of the lever and pushes down on the other arm of the lever. He applies 30 N of force over a distance of 1 m. The other end of the lever moves in the opposite direction and raises the rock a distance of 0.2 M. What is the weight (force) of the rock
What is the mechanical advantage of the lever in question 1?
Answer:
I calculated the mechanical advantage. It is in the picture above
but I haven't gotten the weight but I know the general formula of weight 2 be m×g (mass ×gravity) I will get back 2 u once I solve it plz don't be offended and plz Mark me brainliest answer
Juan uses a lever to lift a rock. The weight of the rock can be calculated by multiplying the force applied on the lever arm by the mechanical advantage of the lever. The mechanical advantage is calculated by dividing the length of the effort arm by the length of the resistance arm.
Explanation:In this question, Juan uses a lever to lift a rock. He applies a force of 30 N over a distance of 1 m on one arm of the lever. The other end of the lever moves in the opposite direction and raises the rock a distance of 0.2 m.
To find the weight (force) of the rock, we can use the principle of moments. The weight of the rock can be calculated by multiplying the force applied on the lever arm by the mechanical advantage of the lever.
The mechanical advantage of a lever is calculated by dividing the length of the effort arm by the length of the resistance arm. In this case, the length of the effort arm is 1 m and the length of the resistance arm is 0.2 m, so the mechanical advantage is 1/0.2 = 5.
Therefore, the weight of the rock is 30 N * 5 = 150 N.
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The centripetal force of an object moving in a circle varies jointly with the mass of the object and the square of its velocity and
inversely as the radius of the circle. A 7-gram object moving in a circle with a radius of 25 centimeters and at velocity of
20 centimeters per second has a centripetal force of 112 dynes. Find the radius of the circle (in cm) on which of a 17-gram
object moving in a circle travels with velocity of 40 centimeters per second and the force on the object is 5,440 dynes.
Answer:
5 cm
Explanation:
Centripetal force varies directly with mass and the square of velocity, and inversely with radius. If k is the constant of proportionality:
F = k m v² / r
When m = 7 g, v = 20 cm/s, and r = 25 cm, then F = 112 dynes. Solving for k:
112 = k (7) (20)² / 25
k = 1
When m = 17 g, v = 40 cm/s, and F = 5440 dynes:
5440 = 1 (17) (40)² / r
r = 5
The radius is 5 cm.
The radius of the circle is 5 cm.
What is velocity?The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.
Given that: The centripetal force of an object moving in a circle varies jointly with the mass of the object and the square of its velocity and
inversely as the radius of the circle.
So, F ∝ mv²/r
F = kmv²/r.
In first case:
Mass of the object; m = 7 gram.
Radius of the circle; r = 25 cm.
Velocity of the object : v =20 cm/s.
And centripetal force: F = 112 dyne.
So, 112 = k 7×20²/25
⇒ k = 1.
In second case:
Mass of the object; m = 17 gram.
Velocity of the object : v =40 cm/s.
And centripetal force: F = 5440 dyne.
Radius of the circle; r =?
So, 5440 = 1×17 ×40²/r
⇒ r = 5 cm.
Hence the radius of the circle is 5 cm.
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A monkey running through the jungle goes 0.198 km straight to the East, then turns 15.8° deflection from straight East toward the South, and then goes 145 m in a straight line in the diagonal direction he is now facing. What is the displacement of the monkey? (put your answer in standard units)
Answer:
[tex]|\vec r|=339.82\ m[/tex]
[tex]\theta=-6.67^o[/tex]
Explanation:
Displacement
It's a vector magnitude that measures the space traveled by a particle between an initial and a final position. The total displacement can be obtained by adding the vectors of each individual displacement. In the case of two displacements:
[tex]\vec r=\vec r_1+\vec r_2[/tex]
Given a vector as its polar coordinates (r,\theta), the corresponding rectangular coordinates are computed with
[tex]x=rcos\theta[/tex]
[tex]y=rsin\theta[/tex]
And the vector is expressed as
[tex]\vec z=<x,y>=<rcos\theta,rsin\theta>[/tex]
The monkey first makes a displacement given by (0.198 km,0°). The angle is 0 because it goes to the East, the zero-reference for angles. Thus the first displacement is
[tex]\vec r_1=<0.198cos0^o,0.198sin0^o>=<0.198,0>\ km=<198,0>\ m[/tex]
The second move is (145 m , -15.8°). The angle is negative because it points South of East. The second displacement is
[tex]\vec r_2=<145cos(-15.8^o),145sin(-15.8^o)>=<139.52,-39.48>\ m[/tex]
The total displacement is
[tex]\vec r=<198,0>\ m+<139.52,-39.48>\ m[/tex]
[tex]\vec r=<337.52,-39.48>\ m[/tex]
In (magnitude,angle) form:
[tex]|\vec r|=\sqrt{337.52^2+(-39.48)^2}=339.82\ m[/tex]
[tex]\boxed{|\vec r|=339.82\ m}[/tex]
[tex]\displaystyle tan\theta=\frac{-39.48}{337.52}=-0.1169[/tex]
[tex]\boxed{\theta=-6.67^o}[/tex]
The word centripetal means"
_______ seeking."
Answer here
Answer:
moving or tending to move toward a center.
Explanation:
the force that is necessary to keep an object moving in a curved path and that is directed inward toward the center of rotation a string on the end of which a stone is whirled about exerts centripetal force on the stone — compare centrifugal force.
Answer: center-seeking
Explanation: a p e x
Two golf balls with the same mass were hit at the same time. Golf ball A went a shorter distance than golf ball B. What could be a reason that this happened?
Golf ball B experienced more friction.
Golf ball A experienced less friction.
Golf ball B was hit with a weaker force.
Golf ball A was hit with a weaker force.
Answer:
Golf ball A was hit with a weaker force
Explanation:
Golf ball B went a larger distance than golf ball A, so we could think friction affected golf ball A rather than golf ball B. That is why the first two choices are wrong.
The strongest forced applied made golf ball B go further.
Golf ball A went a shorter distance than golf ball B because Golf ball A was hit with a weaker force. Therefore, option D is correct.
What is acceleration?The rate of change of an object's velocity with respect to time is known as acceleration. The acceleration exhibits both magnitude and direction so it is a vector.
The second derivative of position w.r.t. time can be used to calculate the acceleration and the 1st derivative of the object's velocity w.r.t. time.
The net of all external forces acting in magnitude is directly proportional to this net resulting force. The magnitude of the acceleration is inversely proportional to the object's mass. From Newton's second law of motion we can deduce the acceleration:
F = ma ⇒ a = F/m
As both balls have the same mass so the ball hit with lesser force will have less acceleration and cover a shorter distance.
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Which of the following is a benefit to exericse?
Answer: Health is a benefit it can reduce the risk of heart disease as well as help you control your weight. It can also help you improve your mental health and mood. It can also help keep your thinking, learning, and judgement skills sharp as you age.
Which of the following is a benefit to exericse?
A. Fight depression
B. Sleep better
C. Concentrate
D. All of the above.
The answer is D5. What is the kinetic energy of a 2,000 kg car that is traveling
10 m/s?
The kinetic energy of the car is calculated using the formula KE = 1/2 * m * v^2, where m is mass and v is velocity. Substituting the given values yields a kinetic energy of 100,000 Joules for the car.
Explanation:The kinetic energy of an object can be calculated using the formula: KE = 1/2 * m * v^2, where 'm' stands for mass and 'v' stands for velocity. In this scenario, the mass (m) of the car is 2,000 kg and the velocity (v) is 10 m/s. Plugging these values into the formula we get: KE = 1/2 * 2000 kg * (10 m/s)^2. Therefore, the kinetic energy of the car is 100,000 Joules.
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1.
A 2 kg toy car moves at a speed of 5 m/s.
a. What is the kinetic energy of the car?
b. If a child applies a 3 N force for 2 m in the same direction the car is already moving, how much work is
done on the car?
c. What is the change in the car’s kinetic energy from the applied force?
d. What is the final kinetic energy of the car?
e. What is the velocity of the car after the child applies the 3 N force?
Answer:
a.25J b.6J c.6J d.31J e.[tex]\sqrt{31}[/tex] m/s
Explanation:
a. using the formula Ek=1/2mv^2, the kinetic energy would be 1/2*2*5^2=25J
b. we can separate the work the child applied. So the work he/she applied would be 2*3=6J (W=FS)
c. by the "Energy conservation law", we knew the energy can be "add up" since they wouldn't "disappear". Thus, the change in the car’s kinetic energy is 6J.
d.25+6=31J
e.now you know the new Ek, and the m, just use the formula again! 31=1/2*2*v^2. So the velocity after the child push it would be [tex]\sqrt{31}[/tex] m/s
The kinetic energy and the work done by the car is:
(a) 25 J
(b) 6 J
(c) 6 J
(d) 31 J
(e) 5.57 m/s
According to the question,
Force,
F = 3 NDistance,
d = 2 m(a)
The Kinetic energy of the car will be:
→ [tex]K_i = \frac{1}{2} mv_0^2[/tex]
[tex]= \frac{1}{2}\times (2)\times (5)^2[/tex]
[tex]= 25 \ J[/tex]
(b)
The work done by the car will be:
→ [tex]W = fd[/tex]
[tex]= 3\times 2[/tex]
[tex]= 6 \ J[/tex]
(c)
The change in the car's K.E will be:
→ [tex]\Delta K = W[/tex]
[tex]= 6 \ J[/tex]
(d)
The car's final K.E will be:
→ [tex]K_f = W+K_i[/tex]
[tex]= 6+25[/tex]
[tex]= 31 \ J[/tex]
(e)
The final velocity of the car will be:
→ [tex]v_f = \sqrt{\frac{2 K_f}{m}}[/tex]
[tex]= \sqrt{\frac{2\times 31}{2} }[/tex]
[tex]= 5.57 \ m/s[/tex]
Thus the above solution is correct.
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A test taker makes an estimate for a 30–second time interval. The estimate is 34.5 seconds. What is the percent error in this example?
Answer:
Its a 30 second interval
Explanation:
A dwarf planet discovered out beyond the orbit of Pluto is known to have an orbital period of 619.36 years. What is its average distance from the sun?
Answer: [tex]72.66 AU=1.089(10)^{10} km[/tex]
Explanation:
Let's begin by explaining that according to Kepler’s Third Law of Planetary motion “The square of the orbital period [tex]T[/tex] of a planet is proportional to the cube of the semi-major axis [tex]a[/tex] of its orbit”:
[tex]T^{2}\propto a^{3}[/tex] (1)
Now, if [tex]T[/tex] is measured in years (Earth years), and [tex]a[/tex] is measured in astronomical units (equivalent to the distance between the Sun and the Earth: [tex]1AU=1.5(10)^{8}km[/tex]), equation (1) becomes:
[tex]T^{2}=a^{3}[/tex] (2)
So, knowing [tex]T=619.36 years[/tex] and isolating [tex]a[/tex] from (2) we have:
[tex]a=\sqrt[3]{T^{2}}[/tex] (3)
[tex]a=\sqrt[3]{(619.36 years)^{2}}[/tex] (4)
Finally:
[tex]a=72.66 AU[/tex] T his is the distance between the dwarf planet and the Sun in astronomical units
Converting this to kilometers, we have:
[tex]a=72.66 AU \frac{1.5(10)^{8}km}{1 AU}=1.089(10)^{10} km[/tex]
describe in detail and example of a character from a television program movie or book you have recently read that is faced with physical needs in the plot please provide the name of the character what book movie or television program you saw them in and describe the context of the situation
Explanation:
I have watched "Sherlock Holmes". It is a story chain of various deeds of a British detective. He uses his senses with full confidence in order to solve various puzzles. He uses detailed observation of any incident or any character.
He collects information from his logic and creates his own story which seems to be fit in given circumstances. He uses deductive reasoning in order to reach to a conclusion. There are various scenes in this whole series where he can tell the whole schedule of a person just simply observing his/her coat.
I remember a scene in which a person comes to him. He just looks at him for few seconds. Sherlock notices tea stain on his coat. In the very next minute, Sherlock asks him, how bad was his morning? The person gets confused and surprised also.
He asks the reason behind Sherlock's question. Sherlock tells him a story based on his deductive reasoning. He tells him about the noticing of tea stain. He also explains size and configuration of that stain. He also elaborates that such dimensions can be obtained only in a fast moving object when someone has fight at the same time.
He also tells him some other details. All these were based on his extreme senses and his detailed perceptions about the circumstances. Sherlock considers his perceptions as real and tests them according to his knowledge and logical reasoning. He mixes all these things with his deductive reasoning which provides him a meaningful story.
Two bodies, one hot and one cold, are kept in vacuum. What will happen to the temperature of the hot body after some time?
Answer:
There are two possibilities:
If the two bodies are in touchIf the two bodies are untouchedAccording to 1st possibility :
If the bodies are in touch then the temperature of hot body decreases and the temperature of cold body increases due to heat transfer and at a point the temperature of two bodies becomes equal.
According to 2nd possibility:
There will not be change in the temperature of two bodies. There will not heat transfer here.
Note: Heat transfers from hot body to cold body.
Hope it helps :)
Two bodies, one hot and one cold are kept in a vacuum the temp of hot bodies may decrease or remain unchanged.
What is temperature?Temperature is the degree of hotness or coldness.heat always flows from the higher body to the lower body temperature.Heat needs a medium to transfer, it cannot travel in a vacuum.Heat can travel through conduction, convection, and radiation.Two possible conditions for temperature change.
If two bodies are in contact then the temperature of the higher body will decrease.
If two body is not in conduct, heat cannot be transferred so the temperature cannot change.
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Which describes the formation of Horizon B?
a-forms at the surface
b-features parent material
c-undergoes the most change
d-forms due to decomposed material
Answer:
It is C, undergoes the most change.
Explanation:
Horizon O forms at the surface due to the accumulation of organic material
Horizon A is mineral rich and forms due to decomposed organic material from above
Horizon B undergoes the most change and no longer resembles parent material
Horizon C features parent material and is barley affected by the soil formation process
Edg2020 notes :)
True or false: You can change the speed of a sound wave by increasing the wavelength.
Group of answer choices
False. Wave speed is determined by frequency, not wavelength.
False. You must decrease the wavelength in order to increase the speed of sound.
False. The speed of sound can only be changed by changing the medium.
True. If the wavelength is increased, then more waves pass per second and the speed of sound increases.
The wavelength of the wave does not affect the speed of wave. Therefore, the given statement is false.
What is wavelength?Wavelength can be described as the distance between identical points or adjacent crests in the adjacent cycles of a waveform propagated in space.
Wavelength can be defined as an inversely related to frequency, which denotes to the number of wave cycles per second. The higher the frequency of wave, the shorter will be its wavelength.
The change in amplitude of the sound wave does not affect its speed. The speed of sound affects by the properties of the medium through which it is traveling.
Changing the wavelength of the sound wave has no effect on the speed of sound. As the distance from the source will increase, the amplitude of the sound wave decreases. The speed of sound depends on the density or nature of the medium.
Therefore, the speed of sound wave can only be changed by changing the medium.
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Final answer:
The claim that increasing the wavelength changes the speed of a sound wave is false, as sound speed is determined by the medium and the relationship between frequency and wavelength, not by the wavelength alone.
Explanation:
The statement 'You can change the speed of a sound wave by increasing the wavelength' is false. The speed of sound (v) is determined by the medium through which it travels and is expressed by the formula v = fλ, where f is the frequency and λ is the wavelength.
Since frequency (f) is determined by the source and remains constant when sound moves from one medium to another, if the speed of the wave (v) changes due to changing medium, the wavelength (λ) must correspondingly adjust to maintain this relationship. Hence, the only way to change the speed of sound is by changing the medium, not by directly altering the wavelength.
What is the number of complete oscillations of a wave per second?
Answer:The commonly used unit for the number of oscillations per second is the Hertz, so that this same pendulum is said to have a frequency of 2 Hertz, or 2 Hz. A third measure of oscillatory motion is the maximum distance of travel of the oscillator. This is called its amplitude.
Explanation:
The number of complete oscillations of a wave per second is known as frequency. It is measured in hertz (Hz). To calculate frequency, divide the number of cycles by the time they occur in, with the relationship between frequency and period (T) being inversely proportional.
The number of complete oscillations of a wave per second is referred to as the frequency of the wave. The unit of measurement for frequency is the hertz (Hz), where 1 Hz equals one cycle per second. The frequency (f) of a wave is calculated by dividing the number of complete wave cycles by the time duration (At) in which these cycles occur. If a mass attached to a spring completes 50 full cycles in 30 seconds, to find the frequency, one would divide 50 by 30, resulting in a frequency of approximately 1.67 Hz.
The relationship between frequency and the period (T) of a wave is inversely proportional, meaning as the period (the time it takes for one complete oscillation) increases, the frequency decreases, and vice versa. This relationship is mathematically represented as f = 1/T. Frequency offers a measure of how fast a wave oscillates in terms of the number of cycles per second, while the period represents the duration of one complete cycle.
Elements are arranged in groups by similar atomic structure on the periodic table. This allows for an element's properties to be predicted based on general periodic trends. One of these trends, atomic radius, increases down a group and to the left along a period and can be defined as __________.
The number of energy levels increases as you move down a group as the number of electrons increases
Explanation:
The determination of distance of separation between the two nuclei of likely atoms connected together called atomic radius. This in a group usually increases from top to bottom. With the increase in the atomic number in the group, the positive nuclear charge increases again. However, the amount of principle energy is also increasing.
High principle energy levels made up of orbits of higher size than low energy levels. The impact of this exceeds the increased nuclear charge, and thus the atomic radius gets increased when going down a group in the periodic tables.
Atomic radius gradually decreases from the side left to the right during the elemental period. This is because all electrons of the same size are added over time or in a family of elements.
Answer:
Literally, the Atomic radius of a chemical element is a term used to describe the size of an atom.
Atomic radius can be regarded as a measure of the size of its atoms. This is often characterized by the mean or typical distance of the chemical element from the center of the nucleus to the boundary of the surrounding shells of electrons.
In general, the size of an atom will decrease as you move from left to the right of a certain period
Periodic Trends of Atomic Radius. An atom gets larger as the number of electronic shells increase; therefore the radius of atoms increases as you go down a certain group in the periodic table of elements.
what is the acceleration of a 2 kg basketball rolling down a cart with a force of 16 n
Answer:
8m/s2
Explanation:
Force = m x a
a = force/mass
= 16/2
= 8m/s2
Which the following statements about the force of friction is true?
A. Friction acts in the direction opposite to weight.
B. Friction acts in the same direction as the normal force.
C. Friction acts in the same direction as weight.
D. Friction acts in the direction opposite to an object's motion.
Who knows how to do this?
Answer:
yes it is D
Explanation:
The following statements true about the force of friction is Friction acts in the direction opposite to an object's motion. The correct option is D.
What is frictional force?When an object is moving on a rough surface, it experiences opposition. This opposing force is called the friction force.
When an object experiences force, it moves in the direction of force, but opposed due to roughness of the surface. This opposition offered is opposite to the force applied. Their directions are opposite to each other.
Thus, the correct option is D.
Learn more about friction force.
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The graph below shows the force required to stretch a spring various distances. Review the graph below.
A graph of Force versus Elongation. Elongation (m) is on the x axis and Force (N) is on the y axis. A straight line passes through the points 0 comma 0 and 10 comma 15.
What is the best approximate value for the elastic potential energy (EPE) of the spring elongated by 7.0 meters?
1.5 J
11 J
37 J
74 J
Answer:
37 J
Explanation:
Given:
A graph of force versus elongation in which a line passes through the points (0, 0) and (10, 15).
The x-axis represents elongation and y-axis represents force.
Elongation (x) = 7.0 m
Now, we know that the slope of a line of force versus elongation graph is the value of the spring constant.
Therefore, finding the slope of the line passing through (0, 0) and (10, 15), we get:
[tex]k=\frac{15-0}{10-0}=1.5\ N/m[/tex]
Therefore, the spring constant (k) = 1.5 N/m.
Now, the elastic potential energy (EPE) of the spring is given as:
[tex]EPE=\frac{1}{2}kx^2[/tex]
Plug in 1.5 for 'k' and 7.0 for 'x'. Solve for EPE.
[tex]EPE=\frac{1}{2}\times 1.5\times (7.0)^2\\\\EPE=\frac{1.5\times 49}{2}\\\\EPE=36.75\approx 37\ J[/tex]
Therefore, the best approximate value for the elastic potential energy (EPE) of the spring elongated by 7.0 meters is 37 J.
In which situation is no work considered to be done by a force?
OA when the angle between the force and displacement is 180°
O B. when the angle between the force and displacement is 90°
Oc when the angle between the force and displacement is 45°
OD. when the angle between the force and displacement is 0°
Answer:
O B. when the angle between the force and displacement is 90°
Explanation:
work defined as [tex]w = f cos Ф * d[/tex]. work can only be done if object moves(displacement) in the direction of force. now a quick one. if you since the varrious angles into the cosine, you would see that Cos 90 will give zero which implies that no work is done. Again, angle means it is perpendicular and so it is not in the direction of force.If the kinetic energy possessed by a man of 50kg is 625J , the speed of man is
Answer: v= 5 m/s
Explanation: Solution:
KE= 1/2 mv²
Derive to find v.
v = √ 2KE / m
Substitute the values
v = √2x 625 J / 50 kg
= √ 1250 J / 50 kg
= √ 25 kg. m/s /kg
= 5 m/s
Unit for J can be expressed in kg.m/s so we cancel kg and the remaining unit is m/s.
How can an object become charged
Answer:
An object gets charged when it's atoms lose or gain an electron to become an ion. For example: ... This means that the fur loses it's electrons to the plastic rod and both objects are now charged. The fur is positively charged because it lost electrons and the rod is negatively charged because it gained electrons
Explanation:
comment how it helps
Answer:
An object becomes charged when it loses or gains electrons.
Explanation:
There are three ways to charge an object:
1)friction,
2)conduction
3)induction.
1) Friction involves rubbing on material with another, resulting in electrons moving from one surface to another.
2)Conduction on the other hand is used to charge things that are good conductors, such a metal.
3)The final way to charge an object is by induction and is, again, best for conductive materials.