Suppose the distance to the Moon were twice its actual value. Could we still have solar eclipses? If so, what type(s)?
What will be an ideal response?
If the Moon were twice its actual distance from us, we would no longer be able to see total solar eclipses because the Moon would not be able to completely cover the surface of the Sun; however, we would still see partial and annular eclipses, although the Moon would not block as much of the Sun during these times.
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The problem of the place of Earth was resolved by the _____
A) Aristotelian Revolution B) Copernican Revolution C) Newtonian Revolution D) Ptolemaic Revolution
A long straight wire is parallel to one edge and is in the plane of a single-turn rectangular loop as shown. If the loop is moving in the plane shown so that the distance x changes at a constant rate of 20 cm/s, what is the magnitude of the emf induced in the loop at the instant x = 5.0 cm? Let I = 50 A, a = 50 cm, b = 6.0 cm
a.
11 ?V
b.
22 ?V
c.
27 ?V
d.
16 ?V
e.
34 ?V
Consider a conducting bar that is free to slide along conducting rails in an upward magnetic field as shown in the diagram below. If we connect the rails to the battery shown, which way will the bar be pushed?
A.A
B.B
C.C
D.D
E. Down into the rails
F. Up off the rails
What makes a transition from a lower energy state to a higher energy state when a photon is absorbed into an atom?
A) proton B) neutron C) electron D) photon E) graviton