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vitfil [10]
3 years ago
8

Can you please help me with this question

Physics
1 answer:
yaroslaw [1]3 years ago
4 0

Um it's so dark here I can't find the question lol...

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If a heat engine pulls 4390.0 J of heat from the hot reservoir and exhausts 3582.2 J of heat to the cold reservoir, what was the
Oksanka [162]

Answer:

18.4

Explanation:

Q1 = 4390 J

Q2 = 3582.2 J

The efficiency of heat engine is given by

n = 1 - Q2 / Q1

n = 1 - 3582.2 / 4390

n = 0.184

n = 18.4 %

8 0
3 years ago
A ball of radius r rolls on the inside of a track of radius R. If the ball starts from rest at the vertical edge of the track, w
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Answer:

Detailed solution is given

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Lifting a piano into a truck is an example of doing negative work. A. True B. False
Elis [28]

Answer:

False

Explanation:

5 0
3 years ago
Hii can someone please help me with this thank u ​
Illusion [34]

Answer:

1. :uniformly accelerated motion

2. .0m/s

6 0
3 years ago
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What are possible units for impulse? Check all that apply.
Neporo4naja [7]

Units of impulse: N • s, kg • meters per second

Explanation:

Impulse is defined in two ways:

1)

Impulse is defined as the product between the force exerted in a collision and the duration of the collision:

I=F\Delta t

where

F is the force

\Delta t is the time interval

Since the force is measured in Newtons (N) and the time is measured in seconds (s), the units for the impulse are

[I] = [N][s]

So,

N • s

2)

Impulse is also defined as the change in momentum experienced by an object:

I=\Delta p

where the change in momentum is given by

\Delta p = m\Delta v

where m is the mass and \Delta v is the change in velocity.

The mass is measured in kilograms (kg) while the change in velocity is measured in metres per second (m/s), therefore the units for impulse are

[I]=[kg][m/s]

so,

kg • meters per second

Learn more about impulse:

brainly.com/question/9484203

#LearnwithBrainly

6 0
3 years ago
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