What will the distance from the point of origin if a car traveled at a speed of 25 km/hr for a time of 1 hour and 15 minutes?

Answer:And the equation shows that the electrical force depends inversely upon the distance of separation between the two charged objects. So whatever change is made in the separation distance, the opposite or inverse change is made in the strength of the electrical force.

Explanation:

does this help

Answer: 3.5 × 10–1 liters

Explanation: Plato

M = mass of the ball A = 5.0 kg

m = mass of the ball B = ?

V = initial velocity of the ball A before collision = 20 m/s

v = initial velocity of the ball B  before collision = 10 m/s

V' = final velocity of the ball A after collision = 10 m/s

v' = final velocity of the ball B after collision = 15 m/s

using conservation of momentum

M V + m v = M V' + m v'

(5.0) (20) + m (10) = (5.0) (10) + m (15)

100 + 10 m= 50 + 15 m

5 m = 50

m= 10 m/s

The mass of unknown ball is of 10 kg.

What is Conservation of Momentum?

The conservation of momentum says that, "When there is a collision between the two objects, then the momentum of each object before the collision is equal to the momentum of objects after the collision.

Given data:

The mass of the first ball is, m = 5.0 kg.

The speed of the first ball is, u = 20 m/s.

The speed of unknown ball is, u' = 10 m/s.

Speed of first ball after collision is, v = 10 m/s (same direction).

Speed of second ball after collision is, v' = 15 m/s (same direction).

Since each ball has the same direction, before and after the collision. So, the expression for the conservation of linear momentum is,

mu + Mu' = mv + Mv'

here,

M is the mass of unknown ball.

Solving as,

(5 × 20) + (M × 10) = (5 × 10) + (M × 15)

100 + 10M = 50 + 15M

50 = 5 M

M = 10 kg

Thus, we can conclude that the mass of unknown ball is of 10 kg.

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Hello!

I would say B since it seems the most accurate according to Einstein's exact explanation for gravity.

Hope this helps! ~Pooch ♥

Final answer:

Gravitation according to Einstein is caused by the bending of space-time by the presence of mass and energy, not by a force of gravity as such. option B

Explanation:

According to Einstein's explanation of gravity, gravitation is caused by B. The bending of space-time by objects and the association accelerated. Einstein's Theory of General Relativity describes this phenomenon in detail, showing that the presence of mass and energy results in the curvature of space-time. This curvature then dictates how objects move within that space. Instead of feeling a force of gravity, objects follow the straightest possible path in this curved space-time, which appears as a curved path in three-dimensional space.

One significant result of the curvature of space-time is the way planets orbit stars, such as Earth orbiting the Sun. The bending of space-time around a massive object like the Sun causes the Earth to move in an orbit instead of flying off in a straight line. Einstein's insights also extended to predict that light would be affected by gravity, which has been confirmed by the observation of light bending around the sun.

Einstein's theory also implied the existence of black holes and has been confirmed through the detection of gravitational waves. These concepts test the fundamentals of General Relativity and further consolidate our understanding of how gravity works.

Earth revolves around the sun, (and rotates on its axis).

Kayakers wax their boats to

c) reduce their input force

Wax is applied by the kayakers to reduce the force of friction between the water and surface of boat. reducing the force of friction between the water and surface of boat reduces the amount of force needed to gain a particular amount of acceleration. hence the input force is greatly reduced by waxing the surface of boat.

a. Independent variable:   TIME

b. Dependent variable:   DISTANCE

Answer:

The reactance of the capacitor

Explanation:

In an AC circuit containing different elements (capacitors, resistors and inductors), we cannot simply calculate the equivalent resistance of the circuit, so another quantity is used, which is called reactance.

For a capacitor, the reactance is given by:

[tex]X=\frac{1}{2 \pi f C}[/tex]

where:

f is the frequency of the AC current in the circuit

C is the capacitance of the capacitor

The reactance has a similar meaning to that of the resistance for a DC current. In fact, we notice that:

- When f=0 (which means we are in regime of DC current, because the current never changes direction), the reactance is infinite. This is correct: in a DC circuit, the capacitor does not let current pass through it, so it like it has infinite resistance (=infinite reactance)

- When f tends to infinite, the reactance becomes zero: in such situation, the current in the circuit changes direction so quickly that the capacitor has no enough time to "block" the current in the circuit, so it like it has almost zero resistance (zero reactance).

Answer:

Explanation:

Capacitive reactance is  the opposition offered to the passage of alternating current.

The capacitive reactance is defined as

[tex]X_{C}=\frac{10^{6} }{2 \pi f C}[/tex]

Where [tex]X_{C}[/tex] is the capacitive reactance in ohms, [tex]f[/tex] is the AC frequency in hertz and [tex]C[/tex] is the capacitance in microfarads.

This mathematical definition stablish a relation between capactivie reactance and frequency, actually these two are inversely proportional, that is, more frequency means less capacitive reactance.

Therefore, the word that completes the statement is reactance.

Answer:

A) 37 m

Explanation:

The car is moving of uniformly accelerated motion, so the distance it covers can be calculated by using the following SUVAT equation:

[tex]v^2 -u^2 = 2ad[/tex] (1)

where

v = 0 m/s is the final velocity of the car

u = 24 m/s is the initial velocity

a is the acceleration

d is the length of the skid

We need to find the acceleration first. We know that the force responsible for the (de)celeration is the force of friction, so:

[tex]F=ma=-\mu mg[/tex]

where

m = 1000 kg is the mass of the car

[tex]\mu = 0.80[/tex] is the coefficient of friction

a is the deceleration of the car

g = 9.8 m/s^2 is the acceleration due to gravity

The negative sign is due to the fact that the force of friction is against the motion of the car, so the sign of the acceleration will be negative because the car is slowing down. From this equation, we find:

[tex]a=-\mu g[/tex]

And we can substitute it into eq.(1) to find d:

[tex]v^2 -u^2 = 2(\-mu g) d\\d= \frac{v^2-u^2}{-2 \mu g}=\frac{0-(24 m/s)^2}{-2(0.80)(9.8 m/s^2)}=36.7 m \sim 37 m[/tex]

The length of skidding marks will be of 37 m. Hence, option (A) is correct.

Given data:

The mass of car is, [tex]m = 1000\;\rm kg[/tex].

The initial speed of car is, u = 24 m/s.

The final speed of car is, v=0.  (Car stops finally due to friction)

The coefficient of friction between the tires road is,  [tex]\mu = 0.80[/tex].

The linear force acting on the car is opposed by the frictional force. Therefore,

Linear force = frictional force

[tex]F = -f\\ma= -\mu mg\\a= -\mu g\\a = -0.8 \times 9.8\\a =-7.84 \;\rm m/s^{2}[/tex]

Now, apply the third kinematic equation of motion as,

[tex]v^{2}=u^{2}+2as\\0=24^{2}+2(-7.84)s\\s \approx 37 \;\rm m[/tex]

Thus, the length of skidding marks will be of 37 m. Hence, option (A) is correct.

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Okay so the electron configuration is [tex]1s^{2}2s^{2}2p^{5}[/tex]. Look at the periodic table. There are 2 blocks you need to know for this question: the s-block, which is comprised of groups 1 and 2, and the p-block, which is comprised of groups 13 through 18. Because your configuration ends in [tex]p^5[/tex], your element has to be in group 17, a halogen. Now, you need to know another thing - your s sub-level has 1 orbital and your p sub-level has 3 orbitals. Every orbital can fill up with 2 electrons. Now, the fact that the configuration ends in [tex]s^{2}...p^{5}[/tex] tells you that the s-orbital is filled, and your p sub-level is not completely filled. If it was, you would have 8 valence electrons, and it would end in [tex]p^6[/tex]. Now, because it ends in [tex]p^5[/tex], it has one less valence electron, so in your element you have 7 valence electrons.

The electronic configuration of an element is 1s²2s²2p⁵, it will have 7 valence electrons. The correct option is C.

An element's electrical configuration is 1s²2s²2p⁵. We need to take into account the outermost energy level, which is the second energy level (marked by the number "2"), in order to calculate the amount of valence electrons.

There are a total of three sublevels in the second energy level: 2s, 2px, 2py, and 2pz. The maximum number of electrons that can be held by the 2s sublevel is 2, and the same is true for the 2p sublevels (2px, 2py, and 2pz).

As can be seen from the electrical structure, there are 2 electrons in the 2s sublevel (1s²2s²) and 5 electrons in the 2p sublevels (2p⁵). Thus, there are seven valence electrons in all for the element.

Thus, the correct option is C 7.

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Your question seems incomplete, the probable complete question is:

The electronic configuration of an element is 1s22s22p5. How many valence electrons does it have?

A. 4

B. 5

C. 7

D. 9

I took the test and this is the answer key showing I got it right..

Hope this helps!

Answer: The nitrogenous bases are complementary to each other which means the complementary bases will bind with each other. Example: Adenine will bind with Thymine and Guanine will bind to Cytosine.

Explanation:

ACTGGAT→    TGACCTA

GCGTACA→   CGCATGT

CGGTTAA→   GCCAATT

AATGGCC→   TTACCGG

ATTGCGT→   TAACGCA

This is how the nitrogenous bases are paired in DNA(deoxyribonucleic acid) which makes one individual different from other.

As per the spectrum due to electromagnetic waves we know that the frequency is increased as we move from radio waves to gamma rays.

So gamma rays must be with highest frequency and lowest wavelength

So error in the above mentioned table is

Gamma rays should have a very high frequency, not a very low frequency.

The mistake that Kamala made from the table is that Gamma rays should have a very high frequency, not a very low frequency.

These are the rays that happen due to radioactive decay that occurs in the atomic nuclei.

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Answer: C. Gravity that pulls matter inward in a spiraling matter.

Explanation:

In astrophysics, particles are pulled towards a massive object due to gravity which further attracts more particles. A disk of particles is formed around the object. Hence, we can define Accretion as a process in which particles are accumulated in a form of a disk of surrounding a massive object (like a black-hole) due to gravity which pulls the matter inwards and matter spirals around the massive object. Galaxies, planets etc. are formed out of accretion process. Thus, the correct option is C.

Answer:

Answer C

Explanation:

Edge

properties of electromagnetic waves are as follows

1. travels at the speed of light

All electromagnetic waves can travel at speed of light through vacuum or air.

2. made of magnetic fields

All electromagnetic waves has magnetic field that oscillates perpendicular to the direction of wave

3. made of electrical fields

All electromagnetic waves has electric field that oscillates perpendicular to the direction of wave

4. radiates from a source

these electromagnetic waves are radiated from source in all directions normally outwards

The wave generated due to electric fields is electromagnetic waves. The properties of electromagnetic waves include - travels at the speed of light and made of magnetic fields.

The vibrations caused due to oscillating electric as well as magnetic fields are known as electromagnetic waves. Electromagnetic waves are also produced by the motion of charged particles.

Following are the properties of electromagnetic waves -

Thus, we can conclude that the properties of electromagnetic waves include - travels at the speed of light and made of magnetic fields.

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Kinetic energy is energy that is moving

Kinetic energy is the energy an object has because of its motion. It's different from potential energy which is stored energy based on an object's position. These energies are often interconverted in many systems.

The correct option is A.

The energy an object has due to its motion is termed as kinetic energy. It can be calculated using the equation KE = 0.5mv², where 'm' is the mass of the object and 'v' is its speed. For example, a ball thrown in a field will gain kinetic energy as it moves through the air. This energy is a form of translational motion which stands true for non-rotational motion.

This is different from potential energy, which is stored energy based upon an object's position or state. A good example is a sled poised at the top of a hill, it has gravitational potential energy because of its elevated position. These types of energy are interrelated, as in many systems potential energy is transformed into kinetic energy, and vice versa.

Hence The correct option is A.

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a. [tex]x(t) = vt' = v(t+4) = 6(t+4) [m][/tex]

Let's call:

[tex]t[/tex] the time calculated from the moment Diane starts her motion and [tex]t'[/tex] the time calculated from the moment Derek starts his motion. Derek starts his motion 4 seconds before Diane: this means that has an "advantage" of 4 seconds, so we can write

[tex]t'=t+4[/tex]

Then:

[tex]v=6 m/s[/tex] is the uniform speed of Derek

Derek is moving in a uniform motion, so Derek's position will be given by (assuming that the starting position is zero):

[tex]x(t) = vt' = v(t+4) = 6(t+4) [m][/tex]

We see that this is correct: in fact, when t=0 (instant when Diane starts her motion), Derek has already travelled for

[tex]x(t=0)=v(0+4)=6 (4)=24 m[/tex]

b. [tex]x'(t)= \frac{1}{2}at^2 =\frac{1}{2}(2)t^2=t^2 [m][/tex]

t is the time calculated from the moment Diane starts her motion. Diane is moving by accelerated motion, with constant acceleration [tex]a=2 m/s^2[/tex] and initial velocity [tex]v_0=0[/tex], so its position at time t is given by the law of uniform accelerated motion:

[tex]x'(t)= \frac{1}{2}at^2 =\frac{1}{2}(2)t^2=t^2[/tex]

c. t = 8.74 s

The time t at which Diane catches up with Derek is the time t at which the positions of the two persons is equal:

[tex]x(t)=x'(t)[/tex]

By solving, we have:

[tex]6 (t+4) = t^2\\t^2 -6t -24 =0[/tex]

Which has two solutions:

t = -2.74 s --> negative, we can discarde it

t = 8.74 s --> this is our solution

d. 76.4 m

When Diane catches Derek, at t=8.74 s, she has covered the following distance:

[tex]x'(t=8.74s)=t^2 = (8.74 s)^2=76.4 m[/tex]

We can verify that Derek is at the same position:

[tex]x(t=8.74 s)=6(t+4)=6(8.74 +4)=76.4 m[/tex]

v = d/t

v = 100/2

v=50

50 mph

c.you should not rest your left elbow on the open window?

you're not in complete control of the heavy, fast moving thing = the car

Answer: c.you should not rest your left elbow on the open window?

While riding in an automobile vehicle certain rules and regulations need to be followed to ride safely. Among the given options, c.you should not rest your left elbow on the open window? is the most relevant one because if you place your arm on the window there are changes that it could be hit by other riding vehicle. So, as a safety precaution the arm should not rest on window on driving.  

Sodium (Na) is a Alkali metal so that's the answer

I suppose A is the right answer

Answer:

Option A. In the middle and toward the left

Explanation:

Thinking step

The periodic table is divided into three segments: metals and non-metals and transition metals. The  metals are on the left hand side of the table. These are made up of the Group I and II elements. Group I elements are alkaline metals. Group II are alkaline earth metals. Both are good electron conductors. They have localized electrons to conduct current.

Transition metals are found in the middle. These are metals like iron and copper. They can change valencies or electrons.  They are good electricity conductors.

Last, the right side is comprised of gases and solid. These are poor electron conductors.

If You paddle a canoe with a force of 325 N and If you and the canoe have a combined mass of 250 kg then the acceleration of the canoe would be 1.3 m/s²

Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.

The mathematical expression for Newton's second law is as follows

F = ma

As given in the problem if you paddle a canoe with a force of 325 N. You and the canoe have a combined mass of 250 kg

F = 325 N

m = 250 Kg

a =?

By substituting the values in the formula

325 =250×a

a = 1.3  m/s²

Thus, If a canoe is paddled with a force of 325 N and has a combined mass of 250 kg, the canoe will accelerate at a rate of 1.3 m/s².

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Answer:

C

Explanation: got it right on plato

The action does peter take that meet the new boy’s parents and tell them to keep their kid away from his daughter. Thus, option D is correct.

The parents generally ask his daughter to stay away from the new boy and raise an issue with the school administrators over admitting students from another culture as well as encourage his daughter to make friends the new boy and they meet the new boy’s parents and tell them to keep their kid away from his daughter.

They also not bother much with the new boy because he is from a different culture and Peter notices that his eight-year-old daughter frequently mentions the unusual habits of a new boy, who is from a different culture, at her school. Raise an issue with the school administrators over admitting students from another culture.

Therefore, The action does peter take that meet the new boy’s parents and tell them to keep their kid away from his daughter. Thus, option D is correct.

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The first and third choices on the list will attract, because UNlike poles are facing across the gap.

Choice #1: . . . [S]-----[N] . . . [S]-----[N]

Choice #3: . . . [N]-----[S] . . . [N]-----[S]

the first and the third chooses are the answer

The value of 'u' is 5 seconds and the acceleration in the first 'u' seconds is 2 m/s^2.

The car first accelerates for u seconds, then travels at a constant speed for 2u seconds. The total time is equal to 3u seconds, and the total distance covered is 125 meters.

We need to find the value of u. According to the equation for motion, the distance covered while accelerating is given by 0.5*a*u^2 (where 'a' is acceleration) and while moving at a constant speed it is given by speed*time which equates to 10*2u.

Therefore we set up the equation: 0.5*a*u^2 + 10*2u = 125. Since the acceleration is constant in the first part of the journey, and we know that speed = acceleration * time, we can say that 10 (final speed) = a * u. Solve this equation for 'a' and you get a = 10 / u.

Next substitute 'a' back to the main equation : 0.5*(10/u)*u^2 + 20u = 125. This simplifies to 5u + 20u = 125. Solving this equation, we find that u = 5 seconds. Substituting u back to the earlier equation, we find acceleration 'a' = 10 / 5 = 2 m/s^2.

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follow procedures precisely.

apex

The question is:

"What is the angle of incidence ?"

Answer: angle of reflection

Explanation: the angle made by a reflected ray with a perpendicular to the reflecting surface.

I would say C as a primary source is a first person encounter meaning the information given should be in detail.

D is incorrect as we cannot infer a scientist written it

B is incorrect because the level of reading for a person does not depend on what type of source it is from

A would not be correct as a secondary source is a person writing about someone else's work