specular reflection obeys the laws of reflection while diffuse reflection does not. question 18 options: true false

The momentum of car B immediately after the collision if the momentum of car A is 21 000 kg m/s after collision is 15000 kg m / s

p = m v

p = Momentum

m = Mass

v = Velocity

m1 = 2000 kg

u1 = 18 m / s

pi1 = 2000 * 18

pi1 = 36000 kg m / s

m2 = 1200 kg

u2 = 0

pi2 = 0

pf1 = 21000

According to law of conservation of momentum

pi1 + pi2 = pf1 + pf2

pi1 = Initial momentum of car A

pi2 = Initial momentum of car B

pf1 = Final momentum of car A

pf2 = Final momentum of car B

pf2 = pi1 + pi2 - pf1

pf2 = 36000 + 0 - 21000

pf2 = 15000 kg m / s

Therefore, the momentum of car B immediately after the collision is 15000 kg m / s

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If you strike the pipe with supports placed at the nodes for the first vibration mode, you will experience a vibration that has a frequency of about 5 Hz.

The amplitude of this vibration will be approximately 1.5 mm and it will occur in a single direction. This means that the pipe will vibrate up and down, but not side to side.

The vibrations caused by striking the pipe will not last very long. In fact, they are only likely to last for about 0.1 seconds before they disappear entirely. They may also cause damage to nearby objects like walls or furniture if they are located too close to where you strike the pipe.

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The force would be the same. Since gravitational force only varies with object mass and separation

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Even if an object's speed is constant, it can nonetheless accelerate if its direction changes.

Newton postulated that an object will only accelerate in the presence of a net or unbalanced force.

An object's velocity (speed and direction) changes at a certain rate, which is called acceleration. As a result, even if an object's speed remains constant, its direction may shift, causing it to accelerate. But the acceleration of an object will be 0 if its velocity is constant.

According to Newton, an item will only accelerate if another force is operating on it that is net or imbalanced. If an imbalanced force is present, the object will accelerate and change its direction and speed, or both.

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When the velocity vector is less than its maximum scale, the tip of the vector serves as the origin of the acceleration cue (6 KTGS). When the velocity vector is at or above maximum scale, the center of the LOS reticle serves as the origin of the acceleration cue.

Knowing that the system is in equilibrium at y=0, or when displacement and acceleration are both equal to zero, is known as the velocity maxima. As a result, the maximum velocity in simple harmonic motion at a given place can be calculated using the formula v=A. A velocity vector shows the rate of change in an object's position. The magnitude of a velocity vector represents an object's speed, whereas the vector's direction represents an object's direction. The apex—the highest point on any trajectory—is reached when vy=0. Given that we are aware of the initial location, initial and final velocities, and initial position, we may determine y using the equation v2y=v20y2g(yy0).

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Among the given options the vehicle that has the most kinetic energy is a 900-kg car traveling 80 km/h

KE = 1 / 2 m v²

KE = Kinetic energy

m = Mass

v = Velocity

For A,

m = 1100 kg

v = 60 km / h

KE = 1 / 2 * 1100 * 60²

KE = 1980000 J

KE = 1980 KJ

For B,

m = 2000 kg

v = 50 km / h

KE = 1 / 2 * 2000 * 50²

KE = 2500000 J

KE = 2500 KJ

For C,

m = 900 kg

v = 80 km / h

KE = 1 / 2 * 900 * 80²

KE = 2880000 J

KE = 2880 KJ

For D,

m = 300 kg

v = 100 km / h

KE = 1 / 2 * 300 * 100²

KE = 1500000 J

KE = 1500 KJ

KEc > KEb > KEa > KEd

Therefore, the 900-kg car traveling 80 km/h has the most kinetic energy

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Answer:

98

Explanation:

You are asking for the pe right? I think this is right

Potential Energy= mgh = (5)(9.8)(2)= 98

As thief is leaving the parking lot in his car, he sees a coworker in the distance, rolls down his window and waves to her. thiew is using a hand wave as a(n) emblem (gesture).

Despite the frequent confusion between the terms emblem and symbol, an emblem is a design that serves to symbolize a concept or a specific person. A deity, a tribe or nation, a virtue or vice, or some other abstraction are all developed in tangible, visual terms by an emblem. An emblem may be worn or utilized in another way as a badge or patch for identification. For instance, in America, police officers' woven emblems on uniforms are used to identify members of a specific unit while their badges allude to their individual metal symbol. A real or metal cockle shell, St. James the Apostle's symbol, was stitched onto a pilgrim's hat or clothing during the Middle Ages to identify them at his shrine in Santiago de Compostela. Numerous saints received symbols in the Middle Ages that were used to identify them in paintings.

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The correct answer is D. (The force of ball on bat and the force of the bat on ball.

Baseball is a game that we need to hit the ball using bat as hard as we can to make the ball fly as far as we can when other player will throw the ball as fast as possible to make it hard to hit.

The ball that pitcher throw has a velocity and acceleration. a ball with velocity will have some Force according to Newton's second Law. On the other side, batter will hit the ball using force from his swing. When the ball and the bat make contact, each force will negate each other. So, in order to make the ball fly high the batter need to give higher force than the force that the ball has.

Newton's Second Law tell us about that the acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the object’s mass.

From that statement we can conclude that the force of an object will get bigger when they move faster

Saturn is less dense than Earth because it has a bigger volume.

Of all the planets in the Solar System, Saturn has the lowest density.

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The length of the beam on which the the two boys are lying is 1.01 m.

The mass of one kid is 30 kg and the mass of the beam is 20kg, the beam is balanced at a distance of 1.10 m from the 30 kg boy when a 40kg boy was sitting at the other end of the beam.

If the beam is balanced at 1.10 m from the 30kg boy it means that there lies the center of mass of the system.

So, let us assume the length of the beam to be X meters and the assume the center of mass to be at center.

So,

0 = M₁X₁ + M₂X₂/M₁+M₂

M₁ is 30kg and X₁ is 1.10m.

M₂ is 40kg and the X₂ is (X-1.10)m.

Putting values,

0 = 30 x 1.1 + 40 x (X-1.1)

(1.1 - X)40 = 3.3

X = 1.01 m.

So, the length of the Beam is 1.01 m.

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To measure one wavelength, you would measure the distance between A and B.

option D is the correct answer.

The wavelength of a wave is the distance travelled by a given a wave.

The wavelength of a wave is measured in meters and it depends on the frequency and speed of the wave.

One wavelength is distance measured from the trough to another trough of  the wave form or the distance measured from crest to another crest of the wave form.

In the given image, the following are one wavelength;

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The speed with which the rock A, B and C  which are thrown same initial speed and same mass hit the ground is equal for all the rocks.

Let us consider the initial velocity be 1 m / s and the height of the cliff to be 10 m.

For the rock A which is thrown vertically downward,

v² = u² + 2 a s

v² = 1 + ( 2 * 9.8 * 10 )

v² = 197 m / s

v = 14 m / s

For rock B which is thrown horizontally,

vx = 1 m / s

v² = u² + 2 a s

v² = 0 + ( 2 * 9.8 * 10 )

v = 14 m / s

vy = 14 m / s

v = √ vx² + vy²

v = √ 1 + 14²

v = √ 197

v = 14 m / s

As we can see here all rocks start with same gravitational potential energy and end with same gravitational energy. So all rocks have equal velocity and kinetic energy, and so energy is conserved. So they all hit the ground with same speed.

Therefore, they all hit the ground with the same speed.

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Answer:

gravitational force .. .. .

Explanation:

The magnitude of the acceleration is -36 m/s² since the toy car is stopping thus, -36 is the deceleration of the toy.

The Force of the object is the product of the mass of the object with the acceleration with which it is moving. It is the vector product. The SI unit of force is Kg-m/s² or Newton(N). The equation for the force is,  

F = ma

where F = Force

m = mass

a = acceleration

The values given for force f = 9.0N,  m = 0.25kg

∴ F = ma

9.0 = 0.25 × a

a = 36 m/s²

Hence, the negative sign indicates the deceleration of the toy car thus the magnitude is -36m/s².

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The force on the section of the wall of the airplane is 3N.

The pressure outside the cabin of the commercial airplane is 0.150 atm and the pressure inside the airplane cabin is 0.900 atm.

The dimensions of the section of wall of the airplane are 2.00 m × 2.00m.

The area of the section = 4.00 m².

We know,

Force applied on the portion = pressure applied on that area × area

So, the force on the section of the wall of airplane will be,

Force  = (0.900-0.150)×4

Force = 3N.

So, the force on the airplane is 3 Newtons.

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The Method of Interaction It's a cooperative method for more effective teamwork.

A combination of hardware and software components that enables computer users to carry out a single job is known as an interaction technique, user interface technique, or input technique.

Four fundamental interaction tasks exist: position, text, select, and quantify. These can be carried out using a variety of hardware and software tools, each of which has been given a category based on its capabilities and qualities.

An interaction occurs when two or more factors have an impact on one another. If one investigates each of their effects independently, they may not have as strong an impact on a result as they might if they occur simultaneously and interact. Caffeine and painkillers are an example of such interaction.

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If the net acceleration is downward but has a magnitude less than G, the force of F has a larger magnitude than the tension in the rope.

We do know thаt the net force equаls mаss times the аccelerаtion. Now if we tаke the block аs а system, meаning we mаke use of the equаtion, mаss times аccelerаtion equаls net force, on the block. Now the lаst element of the rope is pulling the block upwаrds. This is becаuse the block pulls the rope down, hence due to newton's third lаw the rope too should pull the block, but in opposite directions, thаt is upwаrds. Hence the tension аcts upwаrds on the block. Therefore the net force is weight downwаrds аnd tension upwаrds, this equаls mаss times аccelerаtion,

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Input force = (Output force/Output area) × Input area

By Pascal Law,
     
   Input force / input area = Output force / output area

By re-arranging,

      Input force = (Output force/Output area) × Input area

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Answer:

The answer is near 8 trillion

Explanation:

I hope this helps

B is its ending state for the state machine shown below is in state c and receives the string 100010.

A state machine reads a set of inputs and switches states in response to those inputs. A system is said to be in a state when it is waiting to make a transition. A transition is a sequence of steps to carry out when a condition is met or an event is received.

State machines are a type of programming architecture that enable dynamic flow between states based on values from earlier states or user inputs. Applications that can be categorized as a combination of the following fit well with this architecture: States. When to relocate to a specific state, using decision-making logic.

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The farthest position the mouse reaches inside the tunnel is 4 meters into the tunnel.

From the graph,

The positions reached after,

5 s = 4 m

10 s = 2 m

20 s = 2 m

35 s = 3 m

40 s = 0 m

So the farthest position here is 4 m into the tunnel.

The rate of change of positions is displacement. So displacement will be change in initial and final positions divided by change in time.

s = Δx / Δt

Therefore, the farthest position the mouse reaches inside the tunnel is 4 meters into the tunnel.

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The value of the spring constant of the spring is 156800N/m.

As per the work energy theorem, the work done in making the safe go down will be equal to the work done by the spring.

So it can be written

1/2kx² = mgh

K is the spring constant,

x is the compression,

m is the mass of the safe,

g is the acceleration due to gravity which is 9.8m/s²,

H is the height above the ground at which the safe is kept which is 2m.

Now, putting all the values,

1/2(k)(0.5)² = 1000(2)(9.8)

K = 156800 N/m.

So, the value of the spring constant is 156800 N/m.

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The heated (brown) air is separated from the cold (blue) air bubble on the left. A(n) is the term used to describe

"Fronts" are the borders that are formed when air masses converge. Cold front in three dimensions. Temperature changes caused by a front's motion can be used to identify it. A cold front causes a warmer air mass to be replaced by a colder one. Another name for it is a "dryline" or "dry front." a line or zone between two air masses that have different densities and, as a result, are typically at different temperatures. A moving front is given a name based on the air mass that is advancing; for example, a cold front if colder air is going forward. The front is the line separating two air masses. A front typically has overcast, stormy weather. Four separate fronts exist: the Cold, Warm, Stationary, and Occluded fronts. A cold front arises when two cold air masses collide with warm air masses.

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Reverse greenhouse gases are most likely the root cause of Venus' atmosphere and Mars' drastically differing atmospheric characteristics.

The greenhouse effect causes the Earth to absorb more sunlight, heating the planet.

The process by which solar radiation out of a celestial object's sun is absorbed and scattered by the object's earth's atmosphere prevents that energy from reaching the object's surface is known as the anti-greenhouse effect, which would be the opposite of something like the greenhouse effect.

A runaway refrigerator, also known as the reverse greenhouse effect, happened on Mars. Mars' original temperature was lower than that of the Earth because Mars was a little further from the Sun. This indicated that a layer of liquid water formed on the surface when the water vapor condensed.

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☆ Hello ☆

We first apply the data to the problem.

Data:

Then, we apply the formula that is.

Formula:

Finally we develop the problem.

Developing:

The distance traveled is 400 kilometers.

Uniform line movement

Rectilinear uniform motion is one in which an object moves in a straight line, it is a single direction, with a constant speed. When we speak of constant speed we mean that the movement maintains the same speed; that is, the object does not move faster or slower, always at the same speed.

We have that the data is:

Speed (V) = 80 km/h

Distance (d) = ?

Time (t) = 5 h

The formula for uniform motion is:

[tex]\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V=\frac{d}{t} } \end{gathered}$} }[/tex]

We clear for the distance

[tex]\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{d=v*t} \end{gathered}$} }[/tex]

[tex]\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{d=80\ \frac{km}{\not{h}}*5\not{h} } \end{gathered}$}}[/tex]

[tex]\boxed{\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{d=400 \ km} \end{gathered}$}}}[/tex]

The speed of the sled after it has travelled a distance 3.58 meter is 2.96m/s.

Mass of sled = 2.49kg

Initial speed across the horizontal surface = 4.53m/s

Coefficient of kinetic friction between the slate and surface = 0.168

Distance = 3.58m

Now to calculate the acceleration of sled we use :

F = ma

a = F/m

where

a = acceleration

m = mass

F = frictional force

a = μmg / m

a = μg

a = 0.168 x 9.8

a = 1.64m/s²

To calculate the speed of sled we use:

v² = u² - 2as

v² = (4.53)² - 2x 1.64 x 3.58

v² =  8.7785

v = 2.96m/s

The speed of the sled after it has travelled a distance 3.58 meter is 2.96m/s.

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Terminal velocity of the package is 5.16 m/s

When the object's drag force is equal to the gravitational force then it experiences zero acceleration and so the velocity remains constant. Such constant velocity is called as terminal velocity.

Drag force is a kind of frictional force that opposes the flow of motion.

Mathematically drag force F = [tex]\frac{1}{2}[/tex]ρA[tex]v^{2}[/tex]

ρ = density of the package = 1.2 kg/[tex]m^{3}[/tex]

A = 25 [tex]m^{2}[/tex]

v = terminal speed

Also Force is the product of mass and acceleration

Mathematically F = ma

where

m = 44 kg

a = 10 m/[tex]s^{2}[/tex]

Therefore, F = 44 * 10 = 400 N

Putting value of F in the drag force equation we get,

400 =  [tex]\frac{1}{2}[/tex]ρA[tex]v^{2}[/tex]

400 =  [tex]\frac{1}{2}[/tex] * 1.2 * 25 * [tex]v^{2}[/tex]

[tex]v^{2} = \frac{400*2}{1.2 * 25}[/tex]

[tex]v^{2} = \frac{800}{30}[/tex]

v = [tex]\sqrt{26.66}[/tex]

v = 5.16 m/s

The terminal speed of the package if the parachute has an area of 25 [tex]m^{2}[/tex] is 5.16 m/s.

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The formula used to find the growth rate of a population is Birth rate - Death rate = Growth rate.

Population growth = ( Initial population - Population at time measured ) /  Initial population * 100

The population growth rate is also called as rate of natural increase. The average change in population size annually is population growth rate.

Birth rate is the number of births occurring per 1000 population. Death rate is the number of deaths occurring per 1000 population. Since the values are taken per 1000, to find the percentage value the values are divided by 10.

Therefore, the formula used to find the growth rate of a population is Birth rate - Death rate = Growth rate.

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Answer:

Determine the total capacitance between points A and B in the figure below. C =104F C = 5uF C=20uF MAE ce Select the best answer: 2.84uF 2.80uF O 2.90pF 2.86F

Explanation:

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