The density of aluminum is 2700 kg/m3. If transverse waves propagate at 34 m/s in a 4.6-mm diameter aluminum wire, what is the tension on the wire?

A) 52 N
B) 31 N
C) 42 N
D) 62 N


A

Physics & Space Science

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Ice cream, when eaten, gives about 2100. Calories/kg to the body. On the other hand, the body must give back energy to warm it up to body temperature (37°C). Assuming ice cream has similar thermal properties to water:

(a) 1/2 kg produces how much energy? (b) 1/2 kg absorbs how much energy to reach 37°C? (c) What is the net gain or loss (eating 1/2 kg ice cream)?

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Which of the following materials has the highest dielectric constant?

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Most of the detailed information about the planets in our solar system comes from

A) telescopic observations from Earth B) robotic spacecraft C) human visits D) meteorites

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