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Luda [366]
3 years ago
11

Why exactly do people use simple machines like a pulley

Physics
1 answer:
Komok [63]3 years ago
6 0
They can change the direction of force which can result in easier movement.
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It is known that heat is added to a gas in sealed container. The container is fitted with a moveable piston.
jasenka [17]

Answer:

d. Not enough information is given to answer this question.

Explanation:

From first law of thermodynamics

Q= W + ΔU

Q=Heat  ,W= Work , ΔU=Change in internal energy

If work done by the gas :

It means that W and Q both are positive

Q- W = ΔU

Ii Q > W ,then temperature of the gas will increase.

If  Q< W  ,Then temperature of the gas will decreases.

If work done on the gas:

Q positive but W will be negative

Q- W = ΔU

Q= W or Q>W  or Q< W ,then temperature of the gas will increase.

There are three cases because they did not give any information about the work.That is why option d is correct.

3 0
3 years ago
Do you think aksionov is able to get justice in the end? Why?​
Mars2501 [29]
This can be seen through the fact that Aksionov has the ability to seek his own justice many times throughout the story, yet does not take it
3 0
2 years ago
A rocket is fired straight up. It contains two stages (Stage 1 and Stage 2) of solid rocket fuel that are designed to burn for 1
insens350 [35]

Answer: a) 1875m. (b) 8.66s

Explanation:

6 0
3 years ago
Which band of the electromagnetic spectrum has the lowest frequency
Murrr4er [49]

Answer:

Radio waves

Explanation:

Electromagnetic waves are produced by the oscillations of electric and magnetic field. They are transverse waves, which means that the oscillations occur in a direction perpendicular to the direction of propagation of the wave, and they are the only type of waves that can travel through a vacuum.

Electromagnetic waves are classified into 7 different types, depending on their frequencies. From lowest to highest frequencies, we have:

Radio waves

Microwaves

Infrared

Visible light

Ultraviolet

X-rays

Gamma rays

Radio waves are the electromagnetic waves with lowest frequency. They are used, for examples, for satellites, telecommunication, broadcasting.

5 0
3 years ago
Which of the following is a vector?<br> 7 meters<br> 0.007 cm<br> 7x 106m<br> 7 miles Northwest
erma4kov [3.2K]

Answer:

7 miles northeast is the because it has both magnitude and direction .

4 0
3 years ago
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