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zmey [24]
2 years ago
15

Which letter explains why no machine is 100 percent efficient.

Physics
1 answer:
kondaur [170]2 years ago
4 0

Answer:

A

Explanation:

Think about rubbing your hands together- the friciton produces heat

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.Imagine that you pushed a box, applying a force of 60 newtons, over a distance of 4 meters. how much work have you done? 15 jou
DaniilM [7]
Work=force X distance
Newtons is a measurement of force
4 meters is your distance 60×4=240

240 joules
5 0
3 years ago
Read 2 more answers
How do I know what kinematic equations to use when solving a question?
olganol [36]

Explanation:

There are 5 kinematic equations, and 5 variables.

Each question will give you 3 variables and ask you to solve for a fourth.

To determine which equation to use, look at which variable is <em>not</em> included in the problem.

For example, if the question does not include time, then you need to use a kinematic equation that does not have t in it.  That would be:

v² = v₀² + 2aΔx

Or, if the question does not include the final velocity, then you need a kinematic equation that does not have v in it.  That would be:

Δx = v₀ t + ½ at²

5 0
3 years ago
Occurs when an object's velocity decreases
ankoles [38]
The answer would be
Negative Acceleration
3 0
3 years ago
Can someone help with this question pls
morpeh [17]
I solved it and got 374.2N so i would put 375N

sorry i didn’t get any of the ones on there, i probably made a mistake.
6 0
3 years ago
A series of evenly timed pulses create a wave that can be described as a _______<br><br> wave.
son4ous [18]

Answer:

Periodic

Explanation:

A periodic (or repetitive) wave has continuously repeating pattern with characteristics such as amplitude, wavelength and frequency. In a periodic wave, a series of pulses that are evenly timed would be created. In other words, the wave pattern in a periodic wave repeats at regular intervals.

An example of a periodic wave is the sound from the strings of a violin.`

8 0
3 years ago
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