A tennis player on serve tosses a ball straight up. As the tennis ball travels through the air, its speed
1.increases.
2.decreases.
3.decreases and then increases.
4.increases and then decreases.
5.remains the same.
3
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One way to describe the "allowed" matter fields for an isolated hydrogen atom is that they are
A) the electromagnetic fields that can be produced by the orbiting electron. B) the various possible elliptical shapes for the orbit of the electron. C) the possible shapes of the electron's charge that will just "fit" around the nucleus. D) the possible standing waves that will just "fit" around the nucleus. E) the patterns that are spherically symmetric relative to the nucleus.
A coulomb of charge passing through a 6-V battery acquires
A) 6 joules. B) 6 amperes. C) 6 ohms. D) 6 watts. E) 6 newtons.
What is the self-inductance of a solenoid 30.0 cm long having 100 turns of wire and a cross-sectional area of 1.00 × 10-4 m2? (?0 = 4? × 10-7 T ? m/
A) A) 4.19 nH B) 4.19 pH C) 4.19 µH D) 4.19 mH E) 4.19 H
A 4.00 kg hollow cylinder of radius 5.00 cm starts from rest and rolls without slipping down a 30.0 degree incline. If the length of the incline is 50.0 cm, then the velocity of the center of mass of the cylinder at the bottom of the incline is
A. 1.35 
B. 1.82
C. 1.57
D. 2.55
E. 3.02