A force of 4.0 N applied to a spring compresses it by 8.0 cm. What is the amount of work done to compress the spring by an additional amount of 5.0 cm?
A) 20 J
B) 0.26 J
C) 0.50 J
D) 2.0 J
E) 50 N/m
B
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Suppose that a heavy person and a light person are balanced on a teeter-totter made of a plank of wood. Each person now moves in toward the fulcrum a distance of 25 cm. What effect will this have on the balance of the teeter-totter?
A) The teeter-totter will remain in balance. B) The heavy person's end will go down. C) The light person's end will go down. D) One cannot tell whether either end will rise or fall without knowing the relative mass of the plank. E) Only if the plank has significant mass will the light person's end go down.
The ratio of the number of protons to neutrons in the nucleus of naturally occurring isotopes tends to vary with atomic number in what manner?
a. decreases with greater atomic number b. increases with greater atomic number c. remains constant for entire range of atomic numbers d. is maximum for atomic number = 60
In general, how does the size and location of a star's habitable zone depend on the star's mass?
A) the smaller (less massive) the star, the smaller and the closer-in the habitable zone B) the smaller (less massive) the star, the larger and the closer-in the habitable zone C) the smaller (less massive) the star, the larger and the farther-out the habitable zone D) The habitable zone is always about the same size, but its location moves inward for smaller stars.
Identify some two surface radiation configurations other than those shown in Figure 7- 4.
What will be an ideal response?