If two polarizing filters are held with their polarization axes at right angles to each other, the amount of light transmitted compared to when their axes are parallel is

? a

zero.

? b

half as much.

? c

the same.

? d

twice as much.

A circuit consists of a 12.0-V battery connected to three resistors (44ohm, 17ohm and 110ohm) in series. a. Find the current that flows through the battery. I=__mAb. Find the potential difference across the 44ohm resistor. V1=__Vc.

Which "sphere" does an astronomer most directly study? a. biosphere b. exosphere c. geosphere d. cryosphere E. atmosphere F. hydrosphere

A 4.0-kilogram object is accelerated at 3.0 meters per second2 north by an unbalanced force. The same unbalanced force acting on a 2.0-kilogram object will accelerate this object toward the north at (1) 12 m/s2 (3) 3.0 m/s2 (2) 6.0 m/s2 (4) 1.5 m/s2

The difference in electric potential between a thunder cloud and the ground is 2.08 x 10^8 V. Electrons move from the ground which is at a lower potential to the cloud which is at a higher potential.

Which statement does NOT explain the concept of the Doppler Effect? A) As an observer approaches a stationary sound, the sound waves are compressed, making the pitch higher.

How are mass and weight different? a. Mass is the space an object takes up and weight is the effect of gravity on mass. b. Mass is the amount of matter and weight is the effect of gravity on mass. c.

What were the discoveries of astronomers like Copernicus and Galileo?

A major obstacle to developing good human relations is that

4.) An apartment building is on fire and a guy is trapped on the fire escape ladder. There is a dumpster that is 6.3m away and is filled full of trash, and he is 7m above it.

Calculate the temperature of and power-per-area radiated from a blackbody if the spectral intensity density peaks at (a) gamma rays, λ = 1.50*10-14 m; (b) x rays, 1.50 nm; (c) red light, 640 nm; (d) broadcast television waves, 1.