A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its potential energy is a maximum?
A) at either A or B
B) midway between A and B
C) one-third of the way between A and B
D) one-fourth of the way between A and B
E) none of the above
A
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A mass 
is connected by a light string that passes over a pulley of mass M to a mass 
as shown in the figure. Both masses move vertically and there is no slippage between the string and the pulley. The pulley has a radius of 20.0 cm and a moment of inertia of 1?2 
If 
is 3.00 kg, 
is 6.00 kg and M is 4.00 kg, then what is the tension in the string that is attached to mass
src="https://sciemce.com/media/4/1ae955860995e84634.png" class="w-image" />?
A. 20.8 N
B. 27.4 N
C. 30.2 N
D. 37.4 N
E. 43.5 N
What is the maximum number of electrons that can occupy a 3d subshell?
a. 5 c. 10 b. 14 d. 18
A tank contains benzene, which has index of refraction 1.50. A dime is on the bottom of the tank. When viewed at normal incidence the dime appears to be 61 cm below the surface of the benzene. What is the actual depth of the benzene?
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An 8.0-kg object rests on the floor of an elevator which is accelerating downward at a rate of 1.3 m/s2. What is the magnitude of the force the object exerts on the floor of the elevator?
a. 59 N b. 10 N c. 89 N d. 68 N e. 78 N