when a material absorbs energy from light the energy causes the material to do what?

(i) The electric field lines will be farther apart as they move away from the charges since the electric field is weaker there.

(ii) The electric field lines will be farther apart as they move away from the charges since the electric field is weaker there.

The electric field is a physical field that is produced by electrically charged objects. The electric field lines are visual ways of representing the electric field. The electric field lines start on a positive charge and end on a negative charge or extend to infinity. Electric field lines never cross since that would indicate that the electric field would have two different directions at the point of intersection.

The electric field lines are drawn as arrows that indicate the direction of the electric field at a point. The strength of the electric field is proportional to the density of the electric field lines. If the electric field is strong, there will be a high density of electric field lines. If the electric field is weak, there will be a low density of electric field lines.The electric field due to a system of two charges q1 and q2 is the sum of the electric fields due to each charge.

The electric field due to a point charge q at a distance r from the charge is given by the equation E = kq/r², where k is the Coulomb constant. The direction of the electric field at a point is the direction of the electric force that a positive test charge would experience at that point. If the charges q1 and q2 have the same sign, they will repel each other. If the charges q1 and q2 have opposite signs, they will attract each other. The electric field lines for the system of two charges q1 and q2 can be drawn as follows:

(i) q1q2 > 0; q1 > q2 > 0: In this case, the charges q1 and q2 have the same sign and will repel each other. The electric field lines will start on q1 and end on q2, forming a pattern of outward-pointing radial lines. The density of the electric field lines will be higher near the charges since the electric field is stronger there. The electric field lines will be farther apart as they move away from the charges since the electric field is weaker there.

(ii) q1 q2 < 0; q1 > |–q2| < 0, |q1| > |–q2|: In this case, the charges q1 and q2 have opposite signs and will attract each other. The electric field lines will start on q1 and end on q2, forming a pattern of inward-pointing radial lines. The density of the electric field lines will be higher near the charges since the electric field is stronger there. The electric field lines will be farther apart as they move away from the charges since the electric field is weaker there.

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Answer: The work is 1863 N*m

Explanation:

We can define work as:

W = F*d

Where F is the force that the mover needs to apply to the refrigerator, and d is the distance that the refrigerator is moved.

To move the refrigerator, the minimal force that the mover needs to do is exactly the friction force (In this case, the refrigerator will move with constant speed).

Then we will have:

F = 230 N

and the distance is 8.1 meters, then the work will be:

W = 230N*8.1 m = 1863 N*m

Types of Resources can include: material, support and expert; option B.

Resources refers to all the materials  that are available in our environment which are used by man to satisfy his needs and wants.

Resources may either be:

Renewable resources are replenished over a short time while non-renewable resources are not replenished within a short time.

Types of Resources can include:

In conclusion, resources are varied in nature and type.

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Answer: B

Explanation:

took the eng test hope this helps :)

The average speed of the skier as shown in the image  is 2.33 m/s.

Average speed is the ratio of the total distance covered to the total time taken  ot cover the distance.

To calculate the average speed of the skier, we use the formula below.

Formula:

Where:

From the question,

Given:

Suibstitute these values into equation 1

Hence, the average speed of the skier is 2.33 m/s.

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Answer:

The bullet that is fired will spend longer  in the air, hitting the ground after the  dropped bullet.

Explanation:

Using the equation: x =  x 0  +   v t

If we neglect the effects of air resistance, the horizontal motion is a constant velocity.

The horizontal displacement = (velocity X cosθ)

So, the fired bullet has to travel horizontally before falling which takes a  longer time compared to a bullet dropped where it is, height = 1/2 gt^2

gravity, g = 9.8 m/s2.

The time spent in air for the bullet projected at angle depends on the initial velocity of the bullet and angle of projection while bullet dropped from the same height depends on the final velocity of the bullet which depends on the height from the which the bullet was

The given parameters;

The time taken for the bullet fired at angle to return to the ground level is calculated as;

\(T = \frac{2 \times usin(30)}{g} \\\\T = \frac{u}{g}\)

where;

The time taken for bullet dropped from the same height to reach the ground is calculated as;

\(v_f = v_0 + gt\\\\t = \frac{v_f - v_0}{g} \\\\t = \frac{v_f}{g}\)

where

Thus, we can conclude that the time spent in air for the bullet projected at angle depends on the initial velocity of the bullet and angle of projection while bullet dropped from the same height depends on the final velocity of the bullet which depends on the height from the which the bullet was dropped.

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The acceleration is of mother before child reaches half a revolution is,
a) 0.42 radians per second squared b) 0.42 radians per second squared

If both are moving in the same direction, the relative velocity of the child with respect to the mother is the angular velocity of the carousel, which is 2π radians per minute. The mother needs to cover the same distance as the child in half the time, so her relative velocity with respect to the child must be twice the angular velocity of the carousel, which is 4π radians per minute.

To calculate the required acceleration, we can use the formula: acceleration = (final velocity - initial velocity) / time. Since the mother starts from rest and reaches a velocity of 4π radians per minute, the final velocity is 4π radians per minute. The time to cover half a revolution is 30 seconds. Therefore, the acceleration required for the mother to catch up with the child is,

acceleration = (4π - 0) / 30 = 4π/30 ≈ 0.42 radians per second squared

If both are moving in opposite directions, the relative velocity of the child with respect to the mother is the sum of their individual angular velocities. Since the mother is moving in the opposite direction to the carousel, her angular velocity is -2π radians per minute. Therefore, the relative velocity is (2π - (-2π)) = 4π radians per minute.

Using the same formula as before, the acceleration required for the mother to catch up with the child is,

acceleration = (4π - 0) / 30 = 4π/30 ≈ 0.42 radians per second squared

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--The complete question is, A carousel completes 1 revolution every minute. A mother realizes that her child is about to fall and starts moving to protect him when the child already has a 90-degree lead. What acceleration must she reach to catch up with him before the child completes half a revolution? a) If both are moving in the same direction? b) If both are moving in opposite directions?--

The radioactive decay is shown in the image attached to this answer

Answer:

Alpha

Explanation:

An alpha decay is said to have occurred when the mass number of the daughter nucleus decreases by four units and the atomic number of the daughter nucleus decreases by two units.

If we look at the equation from left to right, we will notice that the mass number of the daughter nucleus decreased by four units and the atomic of the daughter nucleus number by two units compared to that of the parent nucleus leading to the emission of an alpha particle.

(a) To determine the position and velocity functions for the rock, we can use the equations of motion under constant acceleration.

Let's choose the upward direction as positive. The acceleration due to gravity is directed downward, so it is negative. The initial position and velocity of the rock are:

Initial position (s0) = 0 (at the edge of the cliff)

Initial velocity (v0) = 0 (rock is dropped)

Using the equation for position:

s(t) = s0 + v0t + (1/2)at^2

Since v0 = 0, the equation simplifies to:

s(t) = (1/2)\(at^2\)

The velocity function is the derivative of the position function:

v(t) = ds(t)/dt = a * t

In this case, the acceleration is the acceleration due to gravity, which is approximately -9.8 \(m/s^2.\)

Therefore, the position function for the rock is:

s(t) = (1/2) * (\(-9.8 m/s^2\)) * \(t^2\)

And the velocity function for the rock is:

v(t) = -\(9.8 m/s^2\) * t

(b) The average velocity on the interval can be calculated by dividing the change in position by the time interval:

Average velocity = (change in position) / (change in time)

The change in position is the final position minus the initial position:

Change in position = s(t2) - s(t1)

Since the rock is dropped, the initial velocity is 0, and the initial position is 0. The final position can be found by substituting t2 = t into the position function:

s(t2) = (1/2) * (-9.8\(m/s^2) * t2^2\)

Therefore, the average velocity is:

Average velocity = [(1/2) * (-9.8\(m/s^2) * t2^2 - 0] / t2 = (1/2) * (-9.8 m/s^2\)) * t2

(c) To find the instantaneous velocities when t = 2 s and t = 5 s, we can substitute the respective values of t into the velocity function:

v(2) = -9.8 \(m/s^2\)* 2 = -19.6 m/s

v(5) = -9.8\(m/s^2\)* 5 = -49 m/s

(d) The time required for the rock to reach the surface of the water can be found by setting the position function equal to the height of the cliff (214 meters) and solving for t:

s(t) = (1/2) * (-9.8 \(m/s^2\)) * \(t^2\) = 214 meters

Solving this equation will give the time at which the rock reaches the water.

(e) The velocity of the rock at impact can be found by substituting the time it takes to reach the water (found in part d) into the velocity function:

v(impact) = -9.8\(m/s^2\) * (time found in part d)

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Answer:

A chemical reaction is a process that occurs when two or more molecules interact to form a new product(s).

Endothermic reactions are chemical reactions in which the reactants absorb heat energy from the surroundings to form products.

Example:

A popular example of an endothermic chemical reaction is photosynthesis. During this process, plants absorb energy from the Sun and convert it into carbon dioxide and water into glucose and oxygen.

An exothermic reaction releases energy into the surrounding of the system.

Example:

the chemical reaction between sodium and chlorine results in the formation of sodium chloride (also known as common salt).

The answer is 0.4

Within 6.6 km (0.4 mi.) of the Earth's surface, approximately one-half of the atmosphere by mass or weight (found between sea level and the height at which air pressure level is 600 mb) is located.

What is atmosphere pressure?

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The expression for gravitational potential energy at distance r in terms of gravitational potential is U = -G × M × m / r + V

The gravitational potential energy (U) of an object of mass (m) at a distance (r) from a central mass (M) can be expressed in terms of the gravitational potential (V) as

U = -G × M × m / r + V

where G is the universal gravitational constant. The term -G × M × m / r represents the gravitational potential energy of the object in isolation, while the term V represents the contribution to the potential energy due to the presence of other masses in the system.

Note that the negative sign in front of the gravitational potential energy term is due to the fact that work must be done to move the object away from the gravitational field, and therefore the potential energy is defined as negative.

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Answer:

1.5 thats how long it is

Explanation:

good luck

Answer:

15.24 m/s in the downward direction

Explanation:

Given that the initial upward velocity of the ball is 24 m/s.

Assuming that the upward direction is positive.

As gravitational force acts in the downward direction and the direction of acceleration is the same as the direction of force, so the acceleration due to gravity will be negative.

Now, from the equation of motion, when an object is launched with initial velocity u, the final velocity, v, of an object after time t is v=u+at.

Given that u=24 m/s, t=4 seconds, \(g=-9.81 m/s^2\).

So, the final velocity is

\(v= 24 + (-9.81)\times 4 \\\\\Rightarrow v= 24-9.81\times 4\)

\(\Rightarrow v=-15.24\) m/s

Here, the negative sign means the final velocity is in the downward direction.

Hence, the velocity after 4 seconds is 15.24 m/s in the downward direction.

According to the given statement , the fluid relative velocity at the interface between the two plates is approximately 0.684 m/s.

To find the fluid relative velocity at the interface between the two plates, we can use the concept of shear rate and the formula for the velocity gradient.

First, let's calculate the shear rate (γ) using the formula:

γ = Δv / Δx

Where:
- Δv is the velocity difference between the two plates, which is given as 1.3 m/s (since the upper plate has a speed of 1.3 m/s at the interface).
- Δx is the distance between the two plates, which is the sum of the thicknesses of the two fluid layers:

Δx = L1 + L2.

Given that L1 = 0.62 mm and L2 = 0.56 mm, we need to convert these values to meters:

L1 = 0.62 mm = 0.62 × 10⁻³ m
L2 = 0.56 mm = 0.56 × 10⁻³ m

Now we can calculate Δx:

Δx = L1 + L2

Substituting the values, we get:

Δx = 0.62 × 10⁻³ m + 0.56 × 10⁻³ m
   = 1.18 × 10⁻³ m

Now we can calculate the shear rate:

γ = Δv / Δx
  = 1.3 m/s / 1.18 × 10⁻³ m

Performing the division, we find:

γ ≈ 1101.7 s^-1

The shear rate (γ) represents the velocity gradient between the two fluid layers. To find the fluid relative velocity at the interface, we need to multiply the shear rate by the thickness of the first layer (L1).

Relative Velocity = γ * L1

Substituting the values, we get:

Relative Velocity = 1101.7 s⁻¹ * 0.62 × 10⁻³ m

Performing the multiplication, we find:

Relative Velocity ≈ 0.684 m/s

Therefore, the fluid relative velocity at the interface between the two plates is approximately 0.684 m/s.

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Answer:

The answer is "case law".

Explanation:

This law is not based on law, but on legislatures, statutes, or legislation, on judgments. Its also used as a different term with common law, which is the collection of precedents as well as power on a specific subject established in previous judicial decisions that are a part of Common law, which is also recognized as case law to establish by the court system based on legal case law.

The statement "True or false solid or liquid particles suspended in the atmosphere; results from wind-blown dust from construction sites, etc..." is true.

True. Solid or liquid particles suspended in the atmosphere, commonly known as particulate matter or aerosols, can include dust particles from construction sites, industrial emissions, vehicle exhaust, and natural sources such as pollen and sea spray. These particles can be carried by wind and remain suspended in the air, contributing to air pollution and affecting air quality.

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The maximum value of a short circuit current from line-to-neutral grounded will depend on various factors such as the voltage level of the electrical system.

The impedance of the circuit, the available fault current, and the protective devices that are in place to limit the current.In a typical residential or commercial electrical system in the United States, the maximum short circuit current from line-to-neutral grounded is typically around 10,000 to 20,000 amps for a 120/240 volt system. However, in larger industrial or utility systems with higher voltage levels, the short circuit current can be much higher and can exceed several hundred thousand amps.It is important to note that short circuit currents can cause significant damage to electrical equipment and can pose a serious safety hazard to people who come into contact with the electrical system.

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The total momentum of the carts after the collision is –16 kg · m/s. The momentum of an object is given by the product of its mass and velocity.

The momentum of an object is given by the product of its mass and velocity. In this case, we know the momentum of each cart before the collision, but we need to use the law of conservation of momentum to find the total momentum of the carts after the collision. The law of conservation of momentum states that the total momentum of a system remains constant if there is no external force acting on the system. In this case, there is no external force acting on the carts, so the total momentum of the carts before the collision is equal to the total momentum of the carts after the collision. We can use the law of conservation of momentum to set up an equation:

Total momentum before collision = Total momentum after collision

(–6 kg · m/s) + (10 kg · m/s) = Total momentum after collision

Total momentum after collision = (–6 kg · m/s) + (10 kg · m/s)

Total momentum after collision = 4 kg · m/s

Therefore, the total momentum of the carts after the collision is 4 kg · m/s,

However, we need to note that the question is asking for the total momentum of the carts after the collision in terms of the momentum of cart 1 and cart 2, so we need to subtract the momentum of cart 2 from the momentum of cart 1 to get the total momentum of the carts after the collision:

Total momentum after collision = Momentum of cart 1 after collision

Momentum of cart 2 after collision

Total momentum after collision = (–6 kg · m/s) – (10 kg · m/s)

Total momentum after collision = –16 kg · m/s

Therefore, the answer is –16 kg · m/s,

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The total momentum of the carts after the collision is -16 kg · m/s. The carts collide and bounce apart, with Cart 1 having a momentum of -6 kg · m/s and Cart 2 having a momentum of 10 kg · m/s before the collision. After the collision, the momentum of the two carts is combined to give a total momentum of -16 kg · m/s.

In more detail, momentum is a vector quantity that represents the motion of an object and is calculated by multiplying its mass and velocity. When two objects collide, the total momentum before the collision is equal to the total momentum after the collision, assuming no external forces are involved. In this case, Cart 1 has a momentum of -6 kg · m/s, indicating it is moving in the opposite direction with respect to a chosen positive direction. Cart 2 has a momentum of 10 kg · m/s, indicating it is moving in the positive direction. After the collision, the carts bounce apart, resulting in a total momentum of -16 kg · m/s, with the negative sign indicating the direction opposite to the chosen positive direction.

Mathematically, we can express the total momentum of the carts after the collision as follows:

\(\[ \text{Total momentum} = \text{Momentum of Cart 1} + \text{Momentum of Cart 2} = -6 \, \text{kg} \cdot \text{m/s} + 10 \, \text{kg} \cdot \text{m/s} = -16 \, \text{kg} \cdot \text{m/s} \]\)

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Answer:

Longshore drift has a very powerful influence on the shape and composition of the coastline. It changes the slopes of beaches and creates long, narrow shoals of land called spits, that extend out from shore. Longshore drift may also create or destroy entire “barrier islands” along a shoreline.

Answer:

3.75km

Explanation:

you're welcome!

Answer:

D. Concrete & E. Drywall

Explanation:

With a light shone upon the materials, Concrete and Drywall neither have a metallic sheen.

The materials that are made from non-metallic resources are granite countertops, concrete, and drywall. Hence, the correct options are A, D, and E.

Non-metallic materials are materials that lack magnetic properties like good electrical conductivity and thermal conductivity. They lack the properties like luster, rigor, and malleability. These materials are essential for many industries and are used for industrial purposes.

Non-metallic minerals do not have any metal substance in them. There is no new product is formed by the process of melting of non-magnetic materials. They do not have any shine or luster and they can break down easily. Eg: sand, gravel, etc.

From the given,

The materials that are made from non-metallic resources are Granite countertops, concrete, and drywall.

Hence, the ideal solutions are options A, D, and E.

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Answer:

When an object vibrates, it causes movement in surrounding air molecules. These molecules bump into the molecules close to them, causing them to vibrate as well. This makes them bump into more nearby air molecules. This “chain reaction” movement, called sound waves, keeps going until the molecules run out of energy.

Explanation:

ANSWER

False.

EXPLANATION

In radioactive decay (or nuclei decay), an unstable nucleus emits radiation into a nucleus that is table and has less energy and a lower mass.

Therefore, nuclei decay from a less stable form to a more stable form.

The answer is false.

To find the spring constant of the horizontal spring, we can use the conservation of energy principle. When the 500 g block of wood comes to rest after compressing the spring, its kinetic energy is converted into potential energy stored in the spring.

The potential energy stored in the spring can be calculated using the formula: PE = (1/2) * k * x^2, where k is the spring constant and x is the compression distance (12 cm = 0.12 m).

The kinetic energy of the block before the collision can be calculated using the formula: KE = (1/2) * m * v^2, where m is the mass of the block (500 g = 0.5 kg) and v is its initial velocity (5.0 m/s).

Since the energy is conserved, we can equate the potential and kinetic energy:

(1/2) * k * x^2 = (1/2) * m * v^2

Now we can solve for the spring constant, k:

k * x^2 = m * v^2

k = (m * v^2) / x^2

k = (0.5 kg * (5.0 m/s)^2) / (0.12 m)^2

k ≈ 173.61 N/m

The spring constant of the horizontal spring is approximately 173.61 N/m.

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Answer:

Nerve and muscle function and fluid balance

Explanation:

:)

Answer: B (nerve and muscle function and fluid balance)

Yes, The velocity of a ball is 1 m/s at a given instant of time. it is possible for the acceleration of the ball to be -1 at this instant.

If it is made sure that the other values are plugged in correctly, a positive velocity is capable of making a negative acceleration.

A moving item always experiences positive acceleration. An object that is slowing down always experiences negative acceleration. However it does not mean that negative acceleration always mean reduction in speed.

Deceleration always slows down motion. However, negative acceleration is just acceleration in the opposite direction according to the selected coordinate system. Negative acceleration might or might not be deceleration, and vice versa for negative acceleration.

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Answer:

study of everything that helps to improve the home and the family

Explanation:

Answer:

➢ Home economics, or family and consumer sciences, is a subject concerning human development, personal and family finance, housing and interior design, food science and preparation, nutrition and wellness, textiles and apparel, and consumer issues.

Explanation:

I hope it will help you....

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