A body of mass 5.0 kg is suspended by a spring which stretches 10 cm when the mass is attached. It is then displaced downward an additional 5.0 cm and released. Its position as a function of time is approximately
a. y = ?0.10 sin 9.9t.
b. y = 0.10 cos 9.9t.
c. y = ?0.10 cos (9.9t + 0.1).
d. y = 0.10 sin (9.9t + 5).
e. y = ?0.05 cos 9.9t.
e
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A 2.0-C charge moves with a velocity of (
) m/s and experiences a magnetic force of (
) N. The x component of the magnetic field is equal to zero. Determine the y component of the magnetic field.
A. ?3.0 T B. +3.0 T C. +5.0 T D. ?5.0 T E. +6.0 T
What do we mean by the singularity of a black hole?
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Detailed measurements of the disk and central bulge region of our Galaxy suggest our Milky Way is a
A) dwarf galaxy. B) spiral galaxy. C) very flat elliptical galaxy. D) very dusty irregular galaxy. E) quasar.
Which one of the arrows below most closely indicates the direction of the bob’s acceleration when it is at point 1?
A. A B. B C. C D. D E. E F. F