2 years ago

I’m having hard time to understand can someone answer it and explain it

Chemistry

1 answer:

tekilochka [14]2 years ago

7 0

Number #2 is joule

In the SI system the unit of heat is the joule. The calorie was defined so that the heat capacity of water was equal to one.The heat capacity of a substance is the amount of heat required to raise the temperature of a defined amount of pure substances by one degree.

Number #3 is Endothermic

Why? I can't explain. I Just left class where they were just explaining that.

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Which statement explains why spontaneous generation is a mistaken idea?

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2 years ago

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3 years ago

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2 years ago

A 1.50-kilogram ball is attached to the end of a 0.520-meter string and swung in a circle. The velocity of the ball is 9.78 m/s.

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Answer:

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Explanation:

Given data:

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Radius = 0.520 m

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Solution:

F centripetal force (tension) = m.v² / R

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F centripetal force (tension) = 1.50 kg . 95.65 m²/s² / 0.520 m

F centripetal force (tension) = 143.5 kg. m²/s² / 0.520 m

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2 years ago