Classify the following statement as a characteristic
(a) of electric forces only,
(b) of magnetic forces only,
(c) of both electric and magnetic forces, or
(d) of neither electric nor magnetic forces.
The force is proportional to the magnitude of the field exerting it.
1.electric forces
2.magnetic forces
3.both electric and magnetic forces
4.neither electric nor magnetic forces
3
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A light ray strikes a hexagonal ice crystal floating in the air at a 30° angle to one face, as shown below. The hexagonal faces of the crystal are perpendicular to the plane of the page. All the rays shown are in the plane of the page, and nice = 1.30. Which outgoing ray is the correct one?
a.
A
b.
B
c.
C
d.
D
e.
E
In an energy level transition from the n = 2 state to the n =1 state for a hydrogen atom a photon will be emitted
Indicate whether the statement is true or false
The entropy of an isolated system never increases
Indicate whether the statement is true or false
Before Einstein, scientists thought that the substance that was "waving" when a light wave was transmitted was
A) phlogisten. B) air. C) ether. D) plasma. E) They didn't think any material substance was waving.