Which statement best describes ionic bonding?

A. Electrons are free to move among many atoms.
B. Electrons are taken away from a full valence shell.
C. Electrons are shared between two atoms.
D. Electrons are transferred from one atom to another.

Answer: 18.35 m/s

Explanation:

At the highest point of trajectory, the vertical component of the velocity would be zero and the tennis ball would have horizontal component of velocity.

It is given that the initial velocity of the ball is 32 m/s and it makes 35° with the vertical. Hence the horizontal component of the velocity,

v sin θ = 32 m/s × sin 35° = 18.35 m/s

Hence, at the highest point in its trajectory, the tennis ball would be moving with the speed  18.35 m/s.

(a) [tex]\vec{F} = 1.0 \vec{i} - 2.0 \vec{j}[/tex]

The two forces are:

[tex]\vec{F_1} = 3.0 \vec{i} + 4.0 \vec{j}\\\vec{F_2} = -2.0 \vec{i} -6.0 \vec{j}[/tex]

To calculate the net force, we must calculate the resultant of the two vectors, which is obtained by separately summing the components of each vector:

[tex]F_x = 3.0 \vec{i}+(-2.0) \vec{i} = 1.0 \vec{i}\\F_y = 4.0 \vec{j} + (-6.0) \vec{j} = -2.0 \vec{j}[/tex]

So, the net force is

[tex]\vec{F} = 1.0 \vec{i} - 2.0 \vec{j}[/tex]

(b) 2.24 N

The magnitude of the net force is given by the Pythagorean theorem: it is equal to the square root of the sum of the squares of the single components:

[tex]|F|= \sqrt{F_x^2+F_y^2}=\sqrt{(1.0)^2+(-2.0)^2}=\sqrt{5}=2.24 N[/tex]

(c) [tex]-63.4^{\circ}[/tex]

The angle of the net force, relative to the positive x direction, is equal to the arctangent of the ratio between the vertical component and the horizontal component:

[tex]\theta=tan^{-1} (\frac{F_y}{F_x})=tan^{-1}(\frac{-2.0}{1.0})=-63.4^{\circ}[/tex]

(d) 2.24 m/s^2

The mass of the object is m = 1 kg, so according to Newton's second law the acceleration is given by

[tex]\vec{a} = \frac{\vec{F}}{m}[/tex]

Since we are interested in the magnitude of the acceleration, we have to take the magnitude of the net force into the calculation:

[tex]|a| = \frac{|F|}{m}=\frac{2.23 N}{1.0 kg}=2.24 m/s^2[/tex]

(e) [tex]-63.4^{\circ}[/tex]

According to Newton's second law:

[tex]\vec{a} = \frac{\vec{F}}{m}[/tex]

The acceleration has the same direction of the force, therefore the angle of the acceleration (measured with respect to the positive x direction) is [tex]-63.4^{\circ}[/tex].

The net force acting on the 1kg standard body is 1.0i - 2.0j in unit vector notation. The magnitude of the net force is 2.236 units. The angle of the net force is -63.43 degrees relative to the positive x-direction. The magnitude and angle of a are not provided in the question.

To find the net force acting on the 1kg standard body, we need to add the two given forces vectorially. Adding f1 and f2 gives us fnet= (3.0 + (-2.0))i + (4.0 + (-6.0))j = 1.0i - 2.0j. So, fnet = 1.0i - 2.0j in unit vector notation.

The magnitude of fnet is found by taking the square root of the sum of the squares of its components: √(1.0² + (-2.0)²) = √5 = 2.236. So, the magnitude of fnet is 2.236 units.

The angle of fnet relative to the positive x-direction can be found using the inverse tangent function: tan^(-1)(-2.0/1.0) = -63.43 degrees. So, the angle of fnet is -63.43 degrees relative to the positive x-direction.

The magnitude and angle of a are not provided in the question, so we cannot determine those values.

a. Independent variable:   TIME

b. Dependent variable:   DISTANCE

The correct answer is 2 N/cm, I take k12 and that was the correct answer

In the acidic column: Coffee, Lemon juice, Orange juice, Soft drink, Vinegar, and Tomato are included. In the basic column: Baking soda and Milk of magnesia are included. In Neutral column: Antacid, Detergent, Salt, Sugar and Water are included.

Here are the classifications of the items in the image:

Acidic:

Coffee - Coffee has a pH of around 5, which is slightly acidic. This is due to the presence of organic acids such as chlorogenic acid and quinic acid.

Lemon juice - Lemon juice has a pH of around 2, which is very acidic. This is due to the presence of citric acid.

Orange juice - Orange juice has a pH of around 3-4, which is acidic. This is due to the presence of citric acid and ascorbic acid.

Soft drink - Soft drinks typically have a pH of around 2.5-3.5, which is acidic. This is due to the presence of phosphoric acid, carbonic acid, and citric acid.

Tomato - Tomatoes are slightly acidic, with a pH of around 4. This is due to the presence of citric acid and malic acid.

Vinegar - Vinegar has a pH of around 2-3, which is very acidic. This is due to the presence of acetic acid.

Basic:

Baking soda - Baking soda has a pH of around 9, which is slightly basic. This is due to the presence of sodium bicarbonate.

Milk of magnesia - Milk of magnesia has a pH of around 10, which is basic. This is due to the presence of magnesium hydroxide.

Neutral:

Antacid - Antacids are typically designed to have a pH of around 7, which is neutral. This is because they are used to neutralize stomach acid.

Detergent - Detergents can have a pH range of 6-12, depending on the type of detergent. However, most detergents are formulated to be neutral or slightly alkaline.

Salt - Salt (sodium chloride) has a pH of around 7, which is neutral.

Sugar- Sugar (sucrose) has a pH of around 7, which is neutral.

Water - Pure water has a pH of 7, which is neutral.

Answer: Remain unchanged

Explanation:

The boat with water barrel overboard floats in swimming pool when weight of the water displaced by the boat is equal to the buoyant force acting on the boat.

When the water in the barrel is poured overboard, the level of the swimming pool level would remain unchanged as the weight of the boat  with the water and barrel would remain unchanged ( as the density and volume of the whole system remains same) and hence, the weight of the water (of the swimming pool) displaced by the boat would remain same.

A boat loaded with a barrel of water floats in a swimming pool. When the water in the barrel is poured overboard, the swimming pool level will remain unchanged.

When water is poured from the barrel in the boat into the pool, the swimming pool water level remains unchanged due to the principles of buoyancy and displacement.

The phenomenon in question is related to the principles of buoyancy and displacement. When the barrel of water is onboard the boat, the total weight of the water and the boat is what displaces the pool water, causing it to rise up to a certain level. When the water is poured overboard, it is still in the pool, but the boat now weighs less and displaces less water. However, since the water from the barrel is now directly part of the pool, it displaces the same volume that the boat was displacing when holding the barrel full of water.

Therefore, the overall level of the swimming pool water will remain unchanged.

#1

Work done is given by

[tex]W = F.d cos\theta[/tex]

here we know that

F = 157 N

d = 14.5

[tex]\theta = 25^0[/tex]

now from the above formula

[tex]W = (157)(14.5)cos25 = 2063.2 J[/tex]

#2

By energy conservation

Initial total potential energy of egg = final total kinetic energy of egg

[tex]mgh = \frac{1}{2}mv^2[/tex]

[tex]v = \sqrt{2gh}[/tex]

[tex]v = \sqrt{2(9.8)(8.2)}[/tex]

[tex]v = 12.7 m/s[/tex]

#3

By momentum conservation we know that

[tex]m_1v_1 = (m_1 + m_2)v[/tex]

[tex]215(9.5) = (215 + 19.7) v[/tex]

[tex] v = \frac{215 (9.5)}{215 + 19.7}[/tex]

[tex]v = 8.7 m/s[/tex]

#4

by momentum conservation we know that

[tex]m_1v_1 + m_2v_2 = (m_1 + m_2) v[/tex]

let direction of velocity of Jay Z car motion is positive direction

now we will say

[tex]1100(-20) + 1475v = (1100 + 1475)(7)[/tex]

[tex]1475 v = 2575(7) + 1100(20)[/tex]

[tex]v = 27.14 m/s[/tex]

Yes Jay Z is overspeeding as his speed is more than speed limit

#5

Tension force in the string will be centripetal force

so here we can say

[tex]T = \frac{mv^2}{R}[/tex]

here we know that

m = 0.63 kg

v = 7.8 m/s

R = 0.23 m

[tex]T = \frac{0.63 (7.8)^2}{0.23}[/tex]

[tex]T = 166.6 N[/tex]

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

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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Answer:

0.52 m

Explanation:

The motion of the studnet is an accelerated motion, with constant acceleration [tex]g=9.8 m/s^2[/tex] (acceleration of gravity) toward the ground. We can find the distance covered by the student (which is equal to the height from which he falls) by using the SUVAT equation:

[tex]v^2 -u^2 = 2ad[/tex]

where

v = 3.2 m/s is the final speed

u = 0 is the initial speed

a = 9.8 m/s^2 is the acceleration

d is the distance covered

By re-arranging the equation, we find:

[tex]d=\frac{v^2-u^2}{2a}=\frac{(3.2 m/s)^2-0}{2(9.8 m/s^2)}=0.52 m[/tex]

Final answer:

The student fell from a height of 0.52 meters.

Explanation:

To calculate the height from which the physics student fell, we can use the formula for free fall. The initial velocity is 0 m/s as the student is dropped. The final velocity is given as 3.2 m/s. We can use the equation v² = u² + 2as, where v is the final velocity, u is the initial velocity, a is the acceleration due to gravity (approximately 9.8 m/s²), and s is the height. Rearranging the equation to solve for s, we get s = (v² - u²) / (2a). Plugging in the values, s = (3.2² - 0) / (2 * 9.8) = 0.52 meters. Therefore, the student fell from a height of 0.52 meters.

The statement that correctly describes the relationship between these two new cells and the parent cell is, mitosis results in two exact copies of the parent cell's genetic information. The correct option is A.

In the cell division process known as mitosis, the parent cell divides to produce two genetically identical daughter cells. Cells from the same father and daughter share genetic information.

Prophase, Metaphase, Anaphase, and Telophase make up Mitosis. Human somatic cells go through a process called mitosis. A cell divides into two identical daughter cells after duplicating all of its components, including its chromosomes, during mitosis.

Therefore, the correct option is A. Mitosis results in two exact copies of the parent cell's genetic information.

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The question is incomplete. Your most probably complete question is given below:

A.Mitosis results in two exact copies of the parent cell's genetic information

B.Mitosis results in four exact copies of the parent cell's genetic information.

C.Mitosis results in two new cells that are genetically different from the parent cell.

D.Mitosis results in four new cells that are genetically different from the parent cell

Answer:

A. 8

Explanation:

Atomic number of oxygen = 8

Oxygen is the 8th element in periodic table.

Atomic no. = 8, means one oxygen atom has 8 protons. Now, because the atom is neutral, so number of electrons = no. of protons in an atom.

Hence, the number of electrons in a neutral oxygen atom is 8.

Answer:A

Explanation:The answer is a because a neutral atom of oxygen is represented as O. It is atomic number of 8. Hence, it contains 8 electrons and 8 protons.

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]

1.53 meters per second

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.  

The average net force required to stop the 4 kg bowling ball in 0.5 s is -80 N.

To find the average net force required to stop the bowling ball, we can use the equation:

average net force = change in momentum / time taken

First, calculate the change in momentum:

Substitute the given values:

Next, divide the change in momentum by the time taken:

Average net force = -40 kg·m/s / 0.5 s = -80 N

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The average net force required to stop a 4 kg bowling ball initially traveling at 10 m/s in 0.5 seconds is -80 N, echoing that the force is used to stop the ball's motion.

To calculate the average net force, we'll need to know the initial velocity, final velocity, and the time it took for the change to occur. In this scenario, the initial velocity is 10 m/s, the final velocity is 0 m/s (since the bowling ball comes to a stop), and the time over which this change happens is 0.5 seconds. The change in velocity (or acceleration) is calculated as (final velocity - initial velocity)/time. So, it's (0 m/s - 10 m/s) / 0.5 s = -20 m/s². As the force is calculated using F = ma, where m is the mass and a is the acceleration, the force would be F = 4 kg × (-20 m/s²) = -80 N. The negative sign indicates that the force is used to stop the motion of the bowling ball.

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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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c ... max speed zero accel

Answer:

A

Explanation:

so other scientists can see how spread out your data are

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.

d = st

100 = 35t

35t = 100

35t/35  =  100/35

t =  20/7  or 2.9 s

The current flowing through the resistor is 2.44 x 10^-3 A.

To find the current flowing through the resistor, you can use Ohm's Law which states that the current (I) is equal to the potential difference (V) across the resistor divided by the resistance (R). In this case, the potential difference across the resistor is 4.4 × 10 V and the resistance is 1.8 kΩ (which can be converted to 1.8 x 10^3 Ω). Using Ohm's Law:

I = V / R = (4.4 x 10) / (1.8 x 10^3) = 2.44 x 10^-3 A

Therefore, the current flowing through the resistor is 2.44 x 10^-3 A.

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.

The cat fell 1.0 m from the ground.

Using the formula

[tex]h = v_{oy}t - \frac{gt^2}{2}[/tex]

Here, [tex]v_{oy} = 0, \; h = 1.0 \; m.[/tex]

Solving for t, the time it spent in the air is

[tex]t = \sqrt{\frac{2h}{g}} = \sqrt{\frac{2(1.0 \; m)}{9.8 \; m/s^2}} = 0.451753951 \; s[/tex]

The cat does not accelerate along the horizontal, so it has constant horizontal velocity. Since it strikes the floor 2.2 m from the table, then

[tex] v_x = \Delta x/t = \frac{2.2\; m}{0.451753951 s} = 4.869907597 \; m/s \Rightarrow 4.9 \; m/s [/tex]

The problem involves concepts of projectile motion and gravity. It first calculates the falling time under gravity and then uses this time to figure out the cat's horizontal speed when it slid off the table, which comes out to be 4.9 m/s.

This problem involves multiple concepts from physics including projectile motion and gravity. The cat sliding off the table can be viewed as a projectile because it moves in two dimensions: horizontally (the cat sliding across the table and off the edge) and vertically (the cat falling down due to gravity). The key is to break down the problem into these two dimensions and solve them separately.

To calculate the horizontal speed, we first need to use the gravitational acceleration and the vertical distance to determine the time it takes for the cat to hit the ground. Assume the gravitational acceleration is approximately 9.8 m/s^2. When an object is falling freely under influence of gravity (from a certain height), the distance is equal to 0.5*g*t^2, where g is the gravitational acceleration and t is time. So, from the equation 1.0m = 0.5*9.8m/s^2*t^2, we solve for t and get t = sqrt(2h/g) = sqrt(2*1/9.8) ≈ 0.45 seconds.

Now, we know the cat hit the floor 2.2 meters away from the edge of the table. Given it did this in approximately 0.45 seconds, we can use the basic speed equation, distance/time, to find out the speed. Therefore, speed = 2.2 m / 0.45 s ≈ 4.9 m/s. This is the speed at which the cat was sliding off the table.

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According to Ohm's law for a portion of the circuit we have:

U=RI=>I=U/R=24/3=8 A

The correct answer is  B

The current flowing through the bulb having a resistance of 3 ohms is 8 A.

The correct answer to the question is Option B. 8 A

From the question given above, the following data were obtained:

Voltage (V) = 24 V

Resistance (R) = 3.0 ohms.

The current flowing through the bulb can be obtained by using the ohm's law equation as illustrated below:

24 = I × 3

Divide both side by 3

I = 24 / 3

Therefore, the current flowing through the bulb is 8 A.

The correct answer to the question is Option B. 8 A

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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:

Explanation:

its 85 cm because it just is in meters it would be .8m  which would be decent distance to hear it

follow procedures precisely.

apex