2 years ago

What will be the ratio between the initial and final kinetic energy of a car, if its velocity is tripled?

Physics

1 answer:

Katarina [22]2 years ago

7 0

Answer:b

Explanation:

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How many type of expansion physic

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Answer:

Three types of thermal expansion are linear expansion,s superficial expansion,cubical expansion

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3 years ago

a) What is the average useful power output of a person who does6.00×10^6Jof useful work in 8.00 h? (b) Working at this rate, how

NARA [144]

Answer:

208.33 W

141.26626 seconds

Explanation:

E = Energy = $6\times 10^6\ J$

t = Time taken = 8 h

m = Mass = 2000 kg

g = Acceleration due to gravity = 9.81 m/s²

h = Height of platform = 1.5 m

Power is obtained when we divide energy by time

$P=\frac{E}{t}\\\Rightarrow P=\frac{6\times 10^6}{8\times 60\times 60}\\\Rightarrow P=208.33\ W$

The average useful power output of the person is 208.33 W

The energy in the next part would be the potential energy

The time taken would be

$t=\frac{E}{P}\\\Rightarrow t=\frac{mgh}{208.33}\\\Rightarrow t=\frac{2000\times 9.81\times 1.5}{208.33}\\\Rightarrow t=141.26626\ s$

The time taken to lift the load is 141.26626 seconds

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3 years ago

Scientists track _________________ to be able to predict geomagnetic storms and technological disturbances on Earth

Misha Larkins [42]

A. Sunspots and solar storms

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2 years ago

Read 2 more answers

1. What is the difference between longitudinal and transverse waves? Compare and contrast

Anvisha [2.4K]

Answer: image to much to type.

Explanation:

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3 years ago

If Sherry took her pulse for 6 seconds and felt 14 beats, What would her heart rate be?

Schach [20]

Answer:

140 beats per minute

Explanation:

There are 60 seconds in a minute and we know that Sherry felt 14 beats in 6 seconds if you multiply 6 by 10 you get 60 seconds which can be 1 minute. Then you multiply 14 by 10 since you 14 by 10 since you multiplied 6 by 10 and you get 140 beats per minute.

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2 years ago