The figure shows two point sources of light, A and B, that emit light waves in phase with each other. A is a distance of 3? from point P. B is distant 5? from P. (? is the wavelength.) The phase difference between the waves arriving at P from A and B is

?



?



a.

0 rad.



b.

? rad.



c.

2? rad.



d.

3? rad.



e.

4? rad.


e

Physics & Space Science

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You are designing a generator with a maximum emf 8.0 V. If the generator coil has 200 turns and a cross-sectional area of 0.030 m2, what would be the frequency of the generator in a magnetic field of 0.030 T?

A) 7.1 Hz B) 7.5 Hz C) 8.0 Hz D) 22 Hz E) 44 Hz

Physics & Space Science

Distance divided by time

A. Gerard de Vaucouleurs

B. Georges Lemaître

C. Hubble’s Law

D. Edwin Hubble

E. Velocity or Speed

F. Ho

Physics & Space Science

Characteristic x-rays are the result of

a. outer electron transitions. b. inner electron transitions. c. nuclear electron states. d. buckytubes.

Physics & Space Science

The process of bonding small solid particles together at high temperature without melting them is called ______________.

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science