How much impulse would be required to change an object’s (mass = 50 kg) velocity from 4m/s to 1m/s? a. 150 N s
b. - 100 N s
c. - 50 N s
d. -150 N s

An ambulance emits a frequency of 450 hz from its siren. what frequency is heard by a man as the ambulance moves toward him? less than 450 hz more than 450 hz 450 hz 0 hz

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

Two polarizers are oriented at 24.0∘ to one another. light polarized at a 12.0-degree angle to each polarizer passes through both. what is the transmitted intensity (%)?