Buoyancy: A polar bear of mass 200 kg stands on an ice floe that is a uniform 1.0 m thick. What is the minimum area of the floe that will just support the bear in saltwater of density 1030 kg/m3? The density of ice is 980 kg/m3.

A. 1.0 m2
B. 2.0 m2
C. 3.0 m2
D. 4.0 m2


Answer: D

Physics & Space Science

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What is the primary reason that we launch X-ray telescopes into space rather than building them on the ground?

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______________ acceleration is necessary for uniform circular motion

Fill in the blank(s) with correct word

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Jack, a quarterback, imparts a spin with his fingers when he throws the football during a match. The concept of _____ explains why the ball continues to spin rapidly as it flies through the air

A) kinetic energy B) angular momentum C) linear force D) specific gravity

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