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sergey [27]
2 years ago
12

Look at the graph. What is the slope of the line?

Physics
1 answer:
NeTakaya2 years ago
7 0

For the first hour, the slope is zero.

After that, the slope is -2 miles per hour.

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A centripetal force causes circular motion because it accelerates an object
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The answer is option A.

Centripetal force is always directed towards the centre and does not change the speed of the body,but there is a change in the direction.

6 0
3 years ago
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If a car's engine gives off 65% thermal energy, what is the maximum efficiency?
stich3 [128]

Answer:

35%

Explanation:

The car's engine gives off 65% thermal energy

So only 35 % is converted into mechanical energy .

input heat = Q₁ = 100

output heat = Q₂ = 65

Work output = Q₁ - Q₂ = W

W = 100 - 65 = 35

Efficiency = W / Q₁ X 100

= (35/ 100) X 100

= 35%.

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2 years ago
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4 0
3 years ago
What is the displacement of a car in 50 s if it is travelling with a velocity of 25 m/s?
Schach [20]

Answer:

v =25 m/s

time= 50 s

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Explanation:

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