What happens when photons strike the surface of a metal? Why does this happen?

Answer: the first option muscular endurance

Explanation:

Answer:

Explanation:

Using the formula for calculating range expressed as;

R = U√2H/g

U is the speed = 300m/s

H is the maximum height = 78.4m

g is the acceleration due to gravity = 9.8m/s²

Substitute into the fromula;

R = 300√2(78.4)/9.8

R = 300 √(16)

R = 300*4

R = 1200m

Hence the projectile travelled 1200m before hitting the ground

Answer:

a. 3

Explanation:

Answer:

A. 3

Explanation:

AP3X

Answer:

ANSWERS ARE 100 % correct

Explanation:

trust me

Answer:

O2 and primary pollutant

a. The sketch graph of U(x) versus x is in the attachment.

b. The force function that associate with the potential energy function is F(x) = 8.0 (2.0 + x)⁻²

c. The speed of the particle at x = 2 is 2 m/s.

The full question is in the attachment. To create a graph, substitute some values ​​of x into the equation of the function to determine the pair of point coordinates.

a. Graph of U(x) = 4.0/(2.0 + x) versus x making a curve because the function is a fraction function and the curve will not intersect the x-axis.

From these coordinates a graph is created in the image.

b. A conservative force is a force that works on an object depends only on the initial and final position of the object and not on the path of the object. The total work from a conservative energy is always the same with the changes in potential energy

W = - ΔU

F × Δx = - ΔU

The conservative force acting on the object is the derivate of the potential energy function for the objects

F = - dU/dx

U(x) = 4.0/(2.0 + x) = 4.0 (2.0 + x)⁻¹

F = - 4.0 × - 2 (2.0 + x)⁻² × 1

F(x) = 8.0 (2.0 + x)⁻²

c. The kinetic energy Ke = 0.5 mv²

When the object is released from rest at the origin to x = 2

According to law of conservation of energy
Ke₁ + U(0) = Ke₂ + U(2)

0 + 2.0 = Ke₂ + 1.0

Ke₂ = 2.0 - 1.0

Ke₂ = 1.0 J

0.5 mv₂² = 1.0

0.5 × 0.5 × v₂² = 1.0

v₂² = 1.0 ÷ 0.25

v₂² = 4

\(v_2 \:=\: \sqrt{4}\)

v₂ = 2 m/s

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Answer:

B

Explanation:

I'm learning it in science.

Answer:

its not b i just took the test and b was wrong

Explanation:

In the divergence theorem, F refers to a vector field. The theorem relates a surface integral of the vector field to a volume integral of its divergence over a solid region.

The divergence theorem, also known as Gauss's theorem, relates a surface integral of a vector field to a volume integral of its divergence over a solid region. It is expressed mathematically as:

∫∫(F · dA) = ∫∫∫ (div F dV)

where F is a vector field, div F is its divergence, ∫∫ represents the surface integral over a closed surface, and ∫∫∫ represents the volume integral over the solid region enclosed by the surface. So F refers to a vector field.

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The ray does not bend when it enters the semi circular glass block - Light ray incident on semicircular block at 90 degrees, therefore there is no change in the direction of ray at P.

Electromagnetic radiation that falls within the region of the electromagnetic spectrum that the human eye can see is known as light or visible light.

Light is electromagnetic radiation that the human eye can perceive. From radio waves with wavelengths measured in meters to gamma rays with wavelengths shorter than around 1 1011 meters, electromagnetic radiation occurs throughout an incredibly broad range of wavelengths.

Light governs our sleep-wake cycle and is crucial to our health and wellbeing. In actuality, "light" that is visible is a type of radiation, which is just energy that moves in the form of electromagnetic waves. It can alternatively be explained as a flow of "wave-packets," or particles, known as photons.

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Answer:

Kenetic Energy?

Explanation:

I need more context of what you are studying here...

Once the ball is thrown, the only force acting on it is gravity, which means that it's acceleration is -9.81 m/s² (negative means downward).

List the known and unknown quantities from the question.

u = initial velocity = 20 m/s

v = final velocity = ? m/s

g = acceleration due to gravity = -9.81 m/s²

t = time interval = ? s

s displacement = 11 m

Before calculating the time it takes for the ball to reach 11 m, the final velocity needs to be calculated using the following kinematic equation.

v² = u² + 2gs

v = √(u² + 2gs)

= √((20 m/s)² + (2x-9.81 m/s² x 11 m)) = 13.57 m/s V=

Calculate the time it takes the ball to reach 11 m using the following kinematic equation.

V = u + gt

Solve for t.

t = (v-u)/g

t (13 57 m/s - 20 m/s)/(-981 m/s²) = 0.655 s

Answer: Hope this helps ;) don't forget to rate this answer !

Explanation:

There are two correct answers:

A) A corporation leader makes direct payment to the candidate.

D) A corporation contributes to a Super PAC that a PAC accepts contributions for a candidate.

Option A describes a scenario where a corporation directly donates money to a presidential candidate, which is allowed as long as it is done within the limits set by campaign finance laws.

Option D describes a scenario where a corporation donates money to a Super PAC, which is a type of political action committee that can accept unlimited donations from individuals, corporations, and other organizations. The Super PAC can then use the money to support or oppose a particular candidate, but it is not allowed to coordinate directly with the candidate or the candidate's campaign.

I hope this helps! Let me know if you have any other questions.

Answer:

Becomes weaker

Explanation:

Hope this helps :)

Subliminal (subconscious) vision is a deliberate process created by communication engineers, whereby you will receive and respond to information and instructions without realizing it. The messages that are in the printed words, pictures or even the sounds that are presented or introduced are either very fast or very subtle passing through your awareness and alertness.

Actually, information, or stimuli that can be consciously felt by humans can be evaluated, criticized, discussed, refuted and possibly rejected by viewers. Something that is subliminally programmed in the subconscious (unconscious) will not encounter such an obstacle. TV viewers may protest, or an image in cyberspace will be rejected. This subliminal information is predictably stored in your brain and is capable of influencing human judgment, and behavior.

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Explanation:

Add all of the velocities together....then the rock will be moving in the OPPOSITE direction according to conservation of momentum

(15 + -12 + 1.2) m/s i = -1.8 m/s i

(5 + 8 + -18 ) m/s j = -5 m/s j      These are the resultant force components  on 210 kg of deer meat

-1.8  (210) i   -  5 (210) j    = 200  x  i    +   200 y j  m/s

results in  rock velocities:     1.89 i  m/s      + 5.25  j m/s  

Please tell me if this is incorrect and I will re-evaluate ......

For a rectangular storage tank filled with paraffin to a depth of 2 m, the volume, weight, mass of paraffin, and pressure at the bottom of the tank are:

a. The volume is 24 m³.

b. weight is 240,000 N,

c. mass is 24,490 kg, and

d. pressure is 23,530 Pa.

a) The volume of paraffin in the rectangular storage tank can be calculated using the formula:

Volume = Length x Width x Depth

Given:

Length = 4 m

Width = 3 m

Depth = 2 m

Substituting the values into the formula, we have:

Volume = 4 m x 3 m x 2 m

Volume = 24 m³

Therefore, the volume of paraffin in the tank is 24 cubic meters.

b) The weight of the paraffin can be calculated using the formula:

Weight = Volume x Density x Acceleration due to gravity

The density of paraffin varies, but we can assume a typical value of 10,000 kg/m³. The acceleration due to gravity is approximately 9.8 m/s². Substituting these values into the formula:

Weight = 24 m³ x 10,000 kg/m³ x 9.8 m/s²

Weight = 240,000 N

Therefore, the weight of the paraffin in the tank is 240,000 Newtons.

c) The mass of the paraffin can be calculated using the formula:

Mass = Density x Volume

Substituting the given values:

Mass = 10,000 kg/m³ x 24 m³

Mass = 24,490 kg

Therefore, the mass of the paraffin in the tank is 24,490 kilograms.

d) The pressure at the bottom of the tank due to the paraffin can be calculated using the formula:

Pressure = Weight / Area

The area of the bottom of the tank is equal to the length multiplied by the width. Substituting the values:

Area = 4 m x 3 m

Area = 12 m²

Pressure = 240,000 N / 12 m²

Pressure = 20,000 Pa

Therefore, the pressure at the bottom of the tank due to the paraffin is 20,000 Pascals (Pa).

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Answer:

2.5 meters per second

Explanation:

50m divided by 20 sec = 2.5 mps

The accurate statement when discussing specific heat is  option A) The specific heat of a gas can be measured at constant pressure.

This is because specific heat is the amount of heat energy required to raise the temperature of a substance by a certain amount. For gases, the specific heat can be measured at either constant pressure or constant volume. However, when discussing specific heat in general, it is more commonly measured at constant pressure.

Option B is incorrect because the specific heat of a gas can also be measured at constant volume, not just constant volume only.

Option C is incorrect because specific heat values for liquids can vary for different ranges of temperature. The specific heat of a substance may change with temperature due to variations in molecular interactions and other factors.

Option D is incorrect because specific heat values for solids can also vary for different ranges of temperature. The specific heat of a solid can depend on factors such as crystal structure, impurities, and temperature range.

Therefore, the accurate statement is option A, which states that the specific heat of a gas can be measured at constant pressure.

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λ = wavelenght

f = frequency = 50 HZ

v = speed = 3400 m/s

Apply:

v = f λ

Isolate λ

λ = V/f

Replacing:

λ = 3400 / 50 = 68 m

Answer: 68m

The box accelerates to the right due to the applied force of 35 N in the +x direction.

Newton's second law states that the acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass. In this case, the net force acting on the box is 35 N in the +x direction, and its mass is 15 kg. Therefore, we can calculate the acceleration using the formula:

acceleration = net force / mass

acceleration = 35 N / 15 kg = 2.33 m/s² (rounded to two decimal places)

Since the box is not accelerating up or down, we can conclude that the force applied is only causing the box to accelerate in the horizontal direction.

Other forces such as gravity and friction are not considered in this scenario. Thus, the 15 kg box will experience an acceleration of approximately 2.33 m/s² in the +x direction due to the applied force of 35 N.

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Given :

A kayak on a lake is moving at a constant speed of 4.1 m/s in a direction 41.6° north of west.

To Find :

After 10 min :

(a) how far west the kayak has traveled km.

(b) how far north the kayak has traveled km.

Solution :

a) Time taken in seconds :

\(t=10\times 60 \ s = 600\ s\) .

Distance travelled in 600 s is :

\(D=s\times t\\\\D=4.1\times 600\ m\\\\D=2460\ m\)

Distance in km is :

\(D=\dfrac{2460}{1000}=2.46\ km\)

b) Now , distance from the north is given by :

\(d=D\times sin\ 41.6^o\\\\d=2.46 \times sin\ 41.6^o\\\\d=1.63\ km\)

Hence , this is the required solution .

Answer:

static and current electricity

Answer:

C. the box accelerates at 2 m/s²

Explanation:

Given

Force (F) = 10 N

mass(m) = 5 kg

acceleration (a) = ?

we know

F = M * a

10 = 5 * a

a = 10 / 5

a = 2 m/s²

Hope it will help :

The energy of a wave is measured in terms of the wave's amplitude.

The energy of a wave depends on the amplitude and the frequency of of the wave.

The energy of a wave is directly proportional to the square of the wave's amplitude.

Mathematically, the formula for energy of a wave is given as;

E = ¹/₂μω²A²

where;

So based on the formula given above, energy of a wave is proportional to the square of wave's amplitude and square of angular frequency of the wave.

Thus, we can conclude that the energy of a wave is measured in terms of the wave's amplitude because the energy of the wave is function of maximum displacement of the wave (wave amplitude).

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We don't need to know about the number of moons per planet in order to support the nebular theory. Hence, option 1 is the correct answer.

The Nebular theory is the most successful theory in the field of cosmology which explains the formation and evolution of the solar system. It was proposed by Immanuel Kant in 1755.

It consists of the following steps-

1) collapse of gases named Nebula Stage

2) Spinning Planetary disc stage, which refers to the rotation of the matter.

3) Protosun Stage, which refers to the formation of the pre-sun.

4)Proto-planets formation stage, which occurs when the inner planet became to form.

5)Moons forming or larger planets forming stage.

6)Final stage, is when the entire solar system is formed.

The Correct answer according to the above postulates is 1) the Number of Moons per planet.

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The car is moving at approximately 12.5 meters per second.

The kinetic energy (KE) of an object can be calculated using the formula:

KE = 1/2 * m * \(v^2\)

where

KE = kinetic energy,

m =Mass of the object, and

v = velocity.

In this case, we are given the mass (m) of the car as 1600 kg and the kinetic energy (KE) as 125,000 J. To find the velocity .

Substituting the  values , we have:

125,000 J = 1/2 * 1600 kg *\(v^2\)

Now, we can solve for v by rearranging the equation:

\(v^2\) = (2 * 125,000 J) / 1600 kg

\(v^2\) = 156.25 \(m^2/s^2\)

Taking the square root, we find:

v = √156.25\(m^2/s^2\)

v ≈ 12.5 m/s

Therefore, the car is moving at approximately 12.5 meters per second.

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Answer:

velocity of ship wrt sea= 7i∧

velocity of women on deck= 40j∧

velocity of women relative to sea will be resultant of above two velocoties,

7i∧ + 40j∧ magnitude is

square root (7 x 7 + 40x40)

=√49+1600

=√1612

=40.14 m/s

Watching Gladiators was a a favorite pastime of Roman civilization. It was a game based on the Roman martial ethics. It lasted for nearly thousands of years. Hence option C is correct.

An armed warrior known as a gladiator amused spectators in the Roman Republic and Roman Empire by engaging in bloody fights with other gladiators, wild animals, and condemned prisoners.

Some gladiators were unpaid volunteers who jeopardized their lives as well as their position in society and the law by participating in the fight. The majority endured severe education, were treated like inferiors in society, and were separated even in death.

Regardless of where they came from, gladiators served as a living example of Rome's martial virtues to onlookers, and by fighting or dying honorably, they may win adulation and widespread renown.

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