How does a lenticular galaxy differ from a normal spiral galaxy?
A) It has no bulge.
B) It has an elongated bulge resembling a bar more than a sphere.
C) It is flatter in shape.
D) It has no gas or dust.
E) It has no spiral arms.
E
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On the planet Venus, a Venusian picks up a stone and drops it into a deep hole. If it falls 3 m in 1 second, how far will it fall in 2 seconds? You can neglect Venusian air resistance
A) 15 m B) 6 m C) 9 m D) 20 m E) 12 m
A straight wire of length L carries a current I in the positive z direction in a region where the magnetic field is uniform and specified by Bx = 3B, By = ?2B, and Bz = B, where B is a constant. What is the magnitude of the magnetic force on the wire?
a. 3.2 ILB b. 5.0 ILB c. 4.2 ILB d. 3.6 ILB e. 1.0 ILB
If a scientific model generates a prediction that is not confirmed experimentally,
A) the experimental data must be modified to be consistent with the model B) it must be initially revised and eventually abandoned if it continues to be inconsistent with experiments C) it must be assumed that there are errors in the experiment D) it must immediately be abandoned
If a car has an x-acceleration of ax (t) = ?bt + c, and its initial x-velocity at time t = 0 is vx (0) = v0, which function below best describes vx (t)?
A. ?b B. ?b + v0 C. 1/2 bt 2 + ct + v0 D. ? 1/2 bt 2 + ct + v0 E. ?2bt 2 + v0 F. ? 1/2 bt 2 + v0