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3 years ago

Why is thermal energy produced not generally usable to do work?

Physics

2 answers:

Leona [35]3 years ago

6 0

Answer: Option (1) is the correct answer.

Explanation:

The internal energy of an object obtained by the kinetic energy of its molecules is known as thermal energy.

Since thermal energy is basically due to the kinetic energy of molecules, that is, rapid movement of molecules and this kinetic energy is released to the surroundings in the form of heat.

Therefore, we can conclude that thermal energy produced is not generally usable to do work because the thermal energy dissipates too quickly and is not concentrated enough to be used.

zhuklara [117]3 years ago

5 0

The ability of thermal energy to dissipate too quickly and not get concentrated makes it not suitable for doing work. In addition, thermal energy comes from the rapid movement of particles in which it is directly proportional. Therefore, the faster the particle movement, more heat or thermal energy is generated.

You might be interested in

How much energy is needed to change the temperature of 50g of water 15°c

zzz [600]

Explanation:

This question is not feasible. There is no way to calculate the energy needed because the question is missing the final temperature

7 0

2 years ago

The engine starter and a headlight of a car are connected in parallel to the 12.0-V car battery. In this situation, the headligh

stepladder [879]

Answer:

The total power they will consume in series is approximately 2.257 W

Explanation:

The connection arrangement of the headlight and the engine starter = Parallel to the battery

The voltage of the battery, V = 12.0 V

The power at which the headlight operates in parallel, $P_{headlight}$ = 38 W

The power at which the kick starter operates in parallel, $P_{kick \ starter}$ = 2.40 kW

We have;

P = V²/R

Where;

R = The resistance

V = The voltage = 12 V (The voltage is the same in parallel circuit)

For the headlight, we have;

R₁ = V²/ $P_{headlight}$ = 12²/38 = 72/19

R₁ = 72/19 Ω

For the kick starter, we have;

R₂ = V²/ $P_{kick \ starter}$ = 12²/2.4 = 60

R₂ = 60 Ω

When the headlight and kick starter are rewired to be in series, we have;

Total resistance, R = R₁ + R₂

Therefore;

R = ((72/19) + 60) Ω = (1212/19) Ω

The current flowing, I = V/R

∴ I = 12 V/(1212/19) Ω = (19/101) A

We note that power, P = I²R

In the series connection, we have;

$P_{headlight}$ = I² × R₁

∴ $P_{headlight}$ = ((19/101) A)² × 72/19 Ω = 1368/10201 W ≈ 0.134 W

The power at which the headlight operates in series, $P_{headlight, S}$ ≈ 0.134 W

$P_{kick \ starter}$ = ((19/101) A)² × 60 Ω = 21660/10201 W ≈ 2.123 W

The power at which the kick starter operates in series, $P_{kick \ starter, S}$ ≈ 2.123 W

The total power they will consume, $P_{Total}$ = $P_{headlight, S}$ + $P_{kick \ starter, S}$

Therefore;

$P_{Total}$ ≈ 0.134 W + 2.123 W = 2.257 W

4 0

3 years ago

Two identical soccer balls are rolled toward each other. What will be true after they collide headon? (2 points)

elixir [45]

Complete Question:

Two identical soccer balls are rolled toward each other. What will be true after they collide headon?

Group of answer choices.

A. they will both stop rolling immediately after they collide head–on.

B. One ball will stop rolling and the other will roll backward at a slower speed.

C. They will both roll back at the same speed they had before the collision

D.They will both roll to the side at a faster speed after the collision

Answer:

C. They will both roll back at the same speed they had before the collision

Explanation:

Newton's Third Law of Motion which states that, for every action there is an equal but opposite reaction.

This ultimately implies that, in every interaction, there is a pair of forces acting on the two interacting objects.

In this scenario, two identical soccer balls are rolled toward each other. Thus, after they collide headon, they will both roll back at the same speed they had before the collision in accordance with Newton’s Third Law of Motion.

Additionally, The law of conservation of momentum states that the total linear momentum of any closed system would always remain constant with respect to time.

This ultimately implies that, if the two identical soccer balls exert forces only on each other, their total momentum is conserved

5 0

3 years ago

Questions to consider:

Margaret [11]

Answer: 2352 J

Explanation:

A body's gravitational potential energy $U$ depends on its position and is mathematically expressed as follows:

$U=mgh$

Where:

$m=60 kg$ is the mass of the skater

$g=9.8 m/s^{2}$ is the acceleration due gravity

$h=4 m$ is the skater's current height

Solving:

$U=(60 kg)(9.8 m/s^{2})(4 m)$

$U=2352 J$

7 0

4 years ago

Zoe went on a fishing trip. On the first day she caught 9 catfish and 6 trout. On second caught 17 catfish and 13 trought. On wh

denis23 [38]

Answer:

Zoe caught a lower ratio of catfish to trout on the second day of her fishing trip

Explanation:

Proportions and Ratios

To compare two quantities we can perform them some 'test' operations like subtraction or division. If we subtract the first quantity from the second quantity, the difference can be positive if the second is greater, negative if the first is greater, or zero if they are equal.

A similar situation comes if we divide the last by the first. If the ratio (division) is greater than one, then the last quantity is greater than the first if it's less than one, the first is greater, and if it's exactly one, they are equal.

Zoe caught 9 catfish and 6 trout on her first day. It produces a ratio of 9/6=1.5 catfish to trout relation. The second day she caught 17 catfish and 13 trout, which gives us a ratio of 17/13=1.3 catfish to trout.

Based on the ratios we can say Zoe caught a lower ratio of catfish to trout on the second day of her fishing trip

4 0

3 years ago