A pile driver drives a post into the ground. The mass of the pile driver is 2500 kg, and it is dropped through a height of 8.0 m on each stroke. If the resisting force of the ground is 2.0 106 N, how far is the post driven in on each stroke?
a. 4.9 cm
c. 16 cm
b. 9.9 cm
d. 49 cm
Question 2
Two kilograms of water at 1.00 atm at the boiling point of 100C is heated until all the water vaporizes. What is its change in entropy? (For water, Lv = 2.26 106 J/kg)
a. 12,100 J/K
c. 3030 J/K
b. 6060 J/K
d. 1220 J/K
The Grants and natural selection of beak size among the medium ground finch.
The sensing wire in a typical hot wire mass air flow sensor.
Textbook Pile
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A 31.1-g sample of Ne gas exerts a certain pressure in a container of fixed volume. What mass ...