You and your friends sit at opposite ends in the back of a pickup traveling north at 60 mph. Your friend, at the front of the pickup bed, throws a ball to you with a speed of 4 mph. You perceive the ball coming towards you with a velocity
A. 4 mph north.
B. 4 mph south.
C. 64 mph north.
D. 56 mph north.
E. 56 mph south.
B. 4 mph south.
You might also like to view...
The meter is presently defined as
a. one ten-millionth of the diameter of Earth. b. the wavelength of a line in the spectrum of krypton-86. c. the length of a platinum-iridium bar. d. the distance light travels in a vacuum in a very short time.
An important similarity that Newton noticed between a falling apple and the moon was that
A) the accelerations of both are toward the center of Earth. B) the net force on both is toward the center of Earth. C) Both of the above. D) the velocity of both is toward the center of Earth. E) All of the above.
A 100 ohm and a 150 ohm resistor are connected in parallel to a 120 V source. What is the current through the 150 ohm resistor?
a. 0.5 b. 0.8 c. 1.2 d. 1.8 e. 2.0 amps
Star A has a radius of 200 000 km and a surface temperature of 6 000 K. Star B has a radius of 400 000 km and a surface temperature of 3 000 K. The emissivity of both stars is the same. What is the ratio of the rate of energy radiated by Star A to that of Star B?