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3 years ago

15

Describe an original example of energy changing from one form to two other forms

1 answer:

irinina [24]3 years ago

8 0

1). an electric motor running
Electrical energy is changing into kinetic energy and a little bit of heat

2). light a match
The chemical energy stored in the match head changes into light and heat energy.

3). a light bulb
Electrical energy is changed into light and heat energy.

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Which one should be my pfp?

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Explanation:

I think the third one coz it's so good

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3 years ago

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Find the magnitude of the torque produced by a 4.8 N force applied to a door at a perpendicular distance of 0.43 m from the hing

SVEN [57.7K]

Answer:

2.064 N.m

Explanation:

Torque: This is the force that act on a system, which tends to cause rotation or twisting. The S.I unit of Torque is N.m

Torque is represented mathematically as,

T = F×d........................ Equation 1

Where T = Torque, F = Force, d = perpendicular distance.

Given: F = 4.8 N, d = 0.43 m.

Substitute into equation 1

T = 4.8×0.43

T = 2.064 N.m

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3 years ago

A closed container is filled with oxygen. The pressure in the container is 245 kPa . What is the pressure in millimeters of merc

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Answer:

Answer to the question is: 1837.65 millimeters of mercury are equal to 245 kPa.

Explanation:

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3 years ago

B all figures represents molecules

Volgvan

C. Figure 11 and figure 1v are both compounds

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3 years ago

A 2.5. Gram arrow enters a 100 g apple with a speed of 115 m/s. If the apple was originally at rest, then what speed will it hav

stich3 [128]

Answer:

The speed of the apple will be 2.81 m/s when the arrow enters it.

Explanation:

We can find the speed of the apple by conservation of linear momentum:

$p_{i} = p_{f}$

$m_{ap}v_{ap_{i}} + m_{a}v_{a_{i}} = m_{ap}v_{ap_{f}} + m_{a}v_{a_{f}}$

Where:

$m_{ap}$ is the mass of the apple = 100 g = 0.1 kg

$m_{a}$ is the mass of the arrow = 2.5 g = 0.0025 kg

$v_{ap_{i}}$ and $v_{ap_{f}}$ is the initial and final speed of the apple respectively

$v_{a_{i}}$ and $v_{a_{f}}$ is the initial and final speed of the arrow respectively

Since the apple was originally at rest ( $v_{ap_{i}}$ = 0) and knowing that $v_{a_{f}}$ = $v_{ap_{f}}$ when the arrow enters into the apple, we have:

$0 + 0.0025 kg*115 m/s = v(0.0025 kg + 0.1 kg)$

$v = 2.81 m/s$

Therefore, the speed of the apple will be 2.81 m/s when the arrow enters it.

I hope it helps you!

5 0

3 years ago