The formula can be used to calculate a star's _____
a. mass
b. distance
c. rotation speed
d. revolution period
e. diameter
b
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The vertical displacement of a string is given by y(x,t) = (6.00 mm) cos[(3.25 m-1)x - (7.22 s-1)t]. What is the period of the wave?
A) 7.22 s B) 1.93 s C) 0.870 s D) 0.308 s E) 0.139 s
How many values of the magnetic quantum number, m?, correspond to a value of 2 for the orbital quantum number, ??
A) 1 B) 2 C) 3 D) 4 E) 5
Planet Zero has a mass of 4.0 × 10^23 kg and a radius of 2.0 × 10^6 m. A 10-kg space probe is launched vertically from the surface of Zero with an initial kinetic energy of 8.0 × 10^7 J. What maximum distance from the center of Zero is achieved by the probe?
a. 3.2 × 10^6 m b. 4.0 × 10^6 m c. 6.0 × 10^6 m d. 5.0 × 10^6 m e. 2.5 × 10^6 m
A battery in a large flashlight produces a current of 2 amperes in a light bulb that has a resistance of 3 ohms. What is the voltage of the battery?