Grandfather clocks are designed in a way that the weight at the bottom of the pendulum can be moved up or down by turning a small screw. Suppose you have a grandfather clock at home that runs slow
Should you turn the adjusting screw so as to raise the weight or lower the weight? A) Raise it.
B) Lower it.
C) It doesn't matter if you raise or lower the weight as long as you displace it by the right amount.
D) It doesn't matter if you raise or lower the weight, as long as you displace it with the correct initial velocity.
E) Raising or lowering the weight doesn't help. The screw is there so that you can add or take away weight.
A
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A) releases energy. B) absorbs energy. C) both of these D) neither of these
What is the angular separation of two spectral lines of wavelengths 497 nm and 251 nm formed in the third order with a diffracting grating having 587 lines per millimeter?
A) 34.8° B) 24.8° C) 41.3° D) 29.4° E) 4.21°
A 2.0-m wire carries a current of 15 A directed along the positive x axis in a region where the magnetic field is uniform and given by B = 
mT. What is the resulting magnetic force on the wire?
A.
) NB.
) NC.
) ND.
) NE.
) NElementary particles that experience the weak nuclear force but not the strong nuclear force are called
A) hadrons. B) baryons. C) leptons. D) mesons. E) bosons.