A 4.00-kg mass and a 9.00-kg mass are being held at rest against a compressed spring on a frictionless surface
When the masses are released, the 4.00-kg mass moves to the east with a speed of 2.00 m/s. What is the velocity of the 9.00-kg mass after the masses are released?
A)
2.00 m/s west
B)
0.888 m/s west
C)
0.500 m/s east
D)
4.50 m/s west
E)
0.500 m/s west
B
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Your pet hamster sits on a record player that has constant angular speed. If the hamster moves to a point twice as far from the center, then its linear speed
A) doubles. B) halves. C) remains the same.
Given that the binding energy of the hydrogen atom in its ground state is -13.6 eV, what is the energy when it is in the n = 5 state?
A) -2.72 eV B) 0.544 eV C) -0.544 eV D) 2.72 eV
In a series circuit consisting of a 12.0 emf, a 2.00 mF capacitor, a 1.00 k
resistor and a switch, what is the voltage across the capacitor at a time 
after the switch is closed?
A. .632 V B. 6.32 V C. 7.58 V D. 8.65 V
An 18-mm-wide diffraction grating has rulings of 710 lines per millimeter. Monochromatic light of wavelength 506 nm wavelength is incident normally on the grating
What is the largest angle from the centerline at which an intensity maximum is formed? A) 46° B) 44° C) 42° D) 40° E) 38°