An object is thrown upwards with a speed of 14 m/s. How high above the projection point does it reach?
A) 5.0 m
B) 10 m
C) 15 m
D) 20 m
E) 25 m
B
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The temperature of a rigid cylinder, 15 cm tall and 15 cm in radius, which is filled with Xenon (a monatomic gas at standard temperature (0oC) and pressure (1 atm). The box is later raised to 25oC. What is the heat input required to perform this act?
A. 490 J B. 250 J C. 160 J D. 300 J E. 100 J F. 150 J
What is the diameter of the galaxy, in km?
A) about 1 billion trillion km (1021 km) B) about 10 trillion km (1013 km) C) about 1 million trillion km (1018 km) D) about 100,000 km (105 km)
A circular coil (radius = 0.25 m) has 143 turns and is in a uniform magnetic field. If the orientation of the coil is varied through all possible positions, the maximum torque on the coil by magnetic forces is 0.29 N?m when the current in the coil is 2.7 mA. What is the magnitude of the magnetic field?
a. 5.47 T b. 0.304 T c. 3.83 T d. 137 T
What is the molecular mass of a water molecule?
A) 10 amu B) 12 amu C) 15 amu D) 18 amu E) none of the above