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Umnica [9.8K]
3 years ago
8

What is the kinetic energy of a 3-kilogram ball that is rolling at 2 meters per second

Physics
1 answer:
melomori [17]3 years ago
5 0
It has a kinetic energy of 6 jules
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Would anyone be kind enough to help me? :)
Travka [436]

Answer:

The racetrack is 996.7 meters long

Explanation:

Convert 251km/h to km/s (kilometers per second)

3600 seconds in an hour, so:

251/3600 = 0.0697km/s

Convert km/s to m/s (meters per second)

1000 meters in a kilometer, so:

0.0697*1000 = 69.7m/s

Find length of racetrack:

69.7m/s*14.3s = 996.7m

If the racer travels 69.7 meters in one second and it takes 14.3 seconds to complete a lap, the racetrack is 996.7 meters long.

6 0
3 years ago
The box of a well-known breakfast cereal states that one ounce of the cereal contains 113 Calories (1 food Calorie = 4186 J). If
mafiozo [28]

Answer:

m=454.73 kg

Explanation:

To convert the energy of the cereal to know the weight:

m*g*h=Q'

Cal=0.0179*113 Cal=2.0227Cal

Q'=2.0227Cal*\frac{4186J}{1Cal}

m*g*h=8467.02J

m*g=\frac{Q'}{h}=\frac{8467.02J}{1.90m}

m*g=4456.33 N

Supuse the gravity as a g=9.8m/s^2

m=\frac{4456.33N}{9.8m/s^2}

m=454.73 kg

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3 years ago
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Who makes sure that planes fly in and out of airports safely and do not run into each other in the skies?
larisa [96]

The correct answer to this is:

“Air traffic controllers”

<span>These people are the personnel who is responsible for the safety, orderly, and swift flow of planes flying in and out of airports using the global air traffic control system. They are generally stationed in air traffic control centers and control towers on the airport ground. They monitor the position, speed, and elevation of aircraft in their designated airspace visually and by radar, and give directions to the pilots by radio.</span>

<span> </span>

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3 years ago
How is sound is different from music how loundness od sound mention some ways to reduce
kondor19780726 [428]

not too sure on this one maybe to locate objects under water, to diagnose problems, to treat medical ailments

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What is a asexual relationship
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A asexual realatioship is where a person has not experienced any sexual attraction, and adding to that it can be an gender male or female body type any other things.
5 0
3 years ago
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