The concentric fringes, formed when a curved lens is placed on an optical flat, are called

A) Galileo circles.
B) Newton's rings.
C) Young's rings.
D) Faraday's circles.
E) Maxwell circles.


B

Physics & Space Science

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What must be true in order for astronomers to be able to use the Doppler technique to determine a planet's mass?

A) The planet's orbit must be viewed nearly edge on. B) The planet must have a very low mass. C) The planet must have a very eccentric orbit. D) The planet's orbit must be seen nearly face on.

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What kind of gas is most affected by thermal escape?

A. greenhouse gases B. light gases C. all gases equally

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Equilibrium: As shown in the figure, a woman is straining to lift a large crate, but without success because it is too heavy. We denote the forces on the crate as follows: P is the magnitude of the upward force being exerted on the crate by the person, C is the magnitude of the vertical contact force on the crate by the floor, and W is the weight of the crate. How are the magnitudes of these forces related while the person is trying unsuccessfully to lift the crate?

A. P + C = W B. P + C < W C. P + C > W D. P = C

Physics & Space Science

A "supernova" is

A) an exploding galaxy. B) an exploding star. C) a slight flare-up of an aged star. D) a new dance step. E) a large new star.

Physics & Space Science