The spacecraft which reveal the possibility of lunar ice are:
A) Lunar Ranger and Surveyor.
B) Apollos XI and XVII.
C) Lunar Orbiter and Rover.
D) Clementine and Lunar Prospector.
E) Vikings 1 and 2.
D
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A gold ring has an inner diameter of 2.168 cm at a temperature of 15.0°C. Determine its diameter at 100.0°C. (?GOLD = 1.42 × 10^?5/°C)
An 8.00 kg object has a moment of inertia of 1.50 kg 
If a torque of 2.00 N•m is applied to the object, the angular acceleration is
A. 0.750 
B. 1.00
C. 1.33
D. 2.01
E. 2.67
A uniform disk has a mass of 3.7 kg and a radius of 0.40 m. The disk is mounted on frictionless bearings and is used as a turntable. The turntable is initially rotating at 30 rpm
A thin-walled hollow cylinder has the same mass and radius as the disk. It is released from rest, just above the turntable, and on the same vertical axis. The hollow cylinder slips on the turntable for 0.20 s until it acquires the same final angular velocity as the turntable. What is the final angular momentum of the system? A) 0.93 kg • m2/s B) 1.1 kg • m2/s C) 1.3 kg • m2/s D) 1.6 kg • m2/s E) 1.9 kg • m2/s
A stationary electric charge produces a magnetic field around it
a. True b. False Indicate whether the statement is true or false