A heater is rated at 1200 watts for a 120-volt source.The current drawn by the heater is 10 amperes

a. True
b. False
Indicate whether the statement is true or false


True

Physics & Space Science

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Plane polarized light of intensity is sent through a polarizer rotated 45clockwise to the original plane of polarization and then through a second polarizer rotated 45 counter-clockwise measured from the original plane of polarization. What is the transmitted intensity?

A. 0.71
B. 0.50
C. 0.35
D. 0.25
E. 0

Physics & Space Science

Many of the mechanical applications of copper alloys are due to high thermal conductivity and excellent _________resistance.

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

Physics & Space Science

Neutron stars do NOT have:

A) masses greater than 1.4 solar masses. B) sizes comparable to large cities. C) strong magnetic fields. D) large surface gravities, compared to the Sun. E) rotation periods comparable to the Sun's.

Physics & Space Science

In air a light source emits a wavelength of 630 nm. Under water the wavelength of this light will be

a. 630 nm. b. less than 630 nm. c. more than 630 nm. d. unpredictable.

Physics & Space Science