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2 years ago

How much thermal energy is Generated?

Physics

2 answers:

kogti [31]2 years ago

5 0

Answer:

1000 J of thermal energy is generated.

Explanation:

The attached figure shows the whole scenario. It consists of three types of energies i.e. Gravitational Potential Energy, Kinetic Energy and thermal energy.

We know that the energy of a system remains conserved. In this case, the gravitational potential energy is the sum of kinetic energy and the thermal energy.

GPE = KE +TE

8000 J = 7000 J + TE

TE = 1000 J

So, the thermal energy is 1000 J. Hence, this is the required solution.

Archy [21]2 years ago

4 0

According to me, if you want to find this answer by fair means or foul then you can :P . Answer will be 1000J

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How many times should the power develop by the engine of a ship increases to double is velocity i the resistance of the water to

Setler79 [48]

Answer:

If the ship speed is doubled, then the power developed is 8 times the initial value.

Explanation:

ship power is roughly proportional to the cube of the speed, so

P ∝ v³

If the speed is doubled, then the power developed becomes

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Therefore, if the ship speed is doubled, then the power developed is 8 times the initial value.

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2 years ago

A model train engine was moving at a constant speed on a straight horizontal track. As the engine moved along, a marble was fir

bagirrra123 [75]

Answer:

The marble was moving in a projectile and the speed of the engine was 2.716 m/s

Explanation:

The vertical component of the marble's flight path relative to the train

is given by the equation y(t) = v*t - (4.9)*t^2,

where, v is the initial upward velocity of the marble relative to the train.

So with y(1) = v - 4.9 = 0 we have

v = 4.9 m/s.

The marble will reach maximum height after 0.5 seconds, at which the

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This horizontal velocity component of the marble is the same as the

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3 years ago

two test cars of equal mass moving towards each other collide on a horiontal frictionless surface. Before the collision, car A h

LiRa [457]

Answer:

4 m/s

Explanation:

m1 = m2 = m

u1 = 20 m/s, u2 = - 12 m/s

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Momentum before collision = momentum after collision

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20 - 12 = 2 v

8 = 2 v

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2 years ago

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Wound it be one that dissolves ?

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2 years ago

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If the scientist repeats the experiment over and over and gets the same results. Also if the scientist peer reviews the experiment to make sure there is no bias in his or her results.

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2 years ago

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