A 2-kg ball is thrown horizontally at. a speed of 10 m/s. At the same time, a 1-kg ball is dropped from the same height. Ignoring air resistance, which ball hits the ground first?

a. the 2-kg ball
b. it's a tie
c. the 1-kg ball


Ans: b. it's a tie

Physics & Space Science

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A 60.0-kg mass person wishes to push a 120-kg mass box across a level floor. The coefficient of static friction between the person's shoes and the floor is 0.700

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Do you think it is possible that a 1.5-solar-mass red giant could harbor an advanced civilization? Explain your reasoning

What will be an ideal response?

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A beam of X-rays of different frequencies is reflected at 10 degrees off a crystal of interatomic spacing 0.2 nm. Which X-ray wavelength is preferentially reflected?

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