A force of 120.0 N is applied to 2.000 cm diameter piston in a closed container of water with a density of 1,000 
The force on a piston with a diameter of 25.00 cm is
A. 18,750 N.
B. 10,450 N.
C. 9,500 N.
D. 9,150 N.
E. 8,450 N.
A. 18,750 N.
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Galileo said that if you rolled a ball along a level surface it would
A) slow down due to its natural tendency to come to rest. B) keep rolling without slowing down if no friction acted upon it. C) roll as long as its inertia nudged it along. D) eventually roll in the opposite direction.
Coil 1, connected to a 100-? resistor, sits inside coil 2 . Coil 1 is connected to a source of 60 cycle per second AC current. Which statement about coil 2 is correct?
a. No current will be induced in coil 2. b. DC current (current flow in only one direction) will be induced in coil 2. c. AC current (current flow in alternating directions) will be induced in coil 2. d. DC current will be induced in coil 2, but its direction will depend on the initial direction of flow of current in coil 1. e. Both AC and DC current will be induced in coil 2.
A point charge (5.0 pC) is located at the center of a spherical surface (radius = 2.0 cm), and a charge of 3.0 pC is spread uniformly upon this surface. Determine the magnitude of the electric field 1.0 cm from the point charge
a. 0.72 kN/C b. 0.45 kN/C c. 0.63 kN/C d. 0.90 kN/C e. 0.18 kN/C
In the figure, the thin lens forms a real image of the object 94.0 cm from the object. What is the focal length of the lens?
A) 22.0 cm B) 25.5 cm C) 27.5 cm D) 55.8 cm E) 86.0 cm