Which star is the closest if all have the same apparent brightness?
A. a temperature 6000 K main sequence star
B. a red giant
C. a temperature 10000 K main sequence star
D. a main sequence star with a luminosity 100 times that of the Sun
E. white dwarf
Ans: E. white dwarf
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Consider two slides, both of the same height. One is long and the other is short. From which slide will a child have a greater final speed when sliding off? Assume that there is no friction acting
1.The child on the longer slide will have a greater final speed. 2.The child on the shorter slide will have a greater final speed. 3.The final speed will be the same for the child on the longer slide as it is for the children on the shorter slide. 4.We cannot tell from the information given.
Buoyancy: A boat loaded with rocks is floating in a swimming pool. If the rocks are thrown into the pool, the water level in the pool, after the rocks have settled to the bottom,
A. rises. B. falls. C. stays the same.
Describe how the sun's rotation is responsible for observed polarities of sunspots
What will be an ideal response?
Resolution: If the diameter of a radar dish is doubled, what happens to its resolving power assuming that all other factors remain unchanged?
A. The resolving power quadruples. B. The resolving power doubles. C. The resolving power is cut in half. D. The resolving power is reduced to one-quarter its original value.