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23 Nov 2019

Ignoring air resistance, find the height from which you must drop an ice cube at 0 so it melts completely on impact. Assume no heat exchange with the environment.

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Irving Heathcote
Irving HeathcoteLv2
1 May 2019

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

Q2.22 When you drop an object from a certain height, it takes time T to reach the ground with no air resistance. If you dropped it from three times that height, how long (in terms of T) would it take to reach the ground?

(a) In air at 0°C, a 1.60-kg copper block at 0°C is set sliding at 2.50 m/s over a sheet of ice at 0°C. Friction brings the block to rest. Find the mass of the ice that melts.

(b) As the block slows down, identify its energy input Q, its change in internal energy , and the change in mechanical energy for the block–ice system.

(c) For the ice as a system, identify its energy input Q and its change in internal energy.

(d) A 1.60-kg block of ice at 0°C is set sliding at 2.50 m/s over a sheet of copper at 0°C. Friction brings the block to rest. Find the mass of the ice that melts.

(e) Evaluate Q and for the block of ice as a system and for the block–ice system.

(f) Evaluate Q and for the metal sheet as a system.

(g) A thin, 1.60-kg slab of copper at 20°C is set sliding at 2.50 m/s over an identical stationary slab at the same temperature. Friction quickly stops the motion. Assuming no energy is transferred to the environment by heat, find the change in temperature of both objects.

(h) Evaluate Q and for the sliding slab and for the two-slab system.

(i) Evaluate Q and for the stationary slab.

Q5.21 A tennis ball drops from rest at the top of a tall glass cylinder-first with the air pumped out of the cylinder so that there is no air resistance, and again after the air has been read- mitted to the cylinder. You examine multiflash photographs of the two drops. Can you tell which photo belongs to which drop? If so, how?

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