Pulling out of a dive, the pilot of an airplane guides his plane into a vertical circle with a radius of 600 m. At the bottom of the dive, the speed of the airplane is 150 m/s
What is the apparent weight (the force that the pilot exerts on the seat) of the 70-kg pilot at that point? A) 3300 N
B) 690 N
C) 2600 N
D) 490 N
E) 1400 N
A
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If you represented each star by a grain of sand, how much sand would it take to represent all the stars in the universe?
A) all the sand in a typical playground sandlot B) all the sand on Miami Beach C) all the sand on the beaches of California D) all the sand on the beaches in the United States E) more than all the sand on all the beaches on Earth
Most of the current star formation in the Milky Way occurs in spiral arms
Indicate whether the statement is true or false
A bank vault is opened by applying a force of 140 N perpendicular to the plane of the door, 1.20 m from the hinges. Find the torque due to this force about an axis through the hinges
a. 117 N·m b. 308 N·m c. 140 N·m d. 168 N·m e. 154 N·m
H II regions are usually found isolated from other stars or types of nebulae
Indicate whether the statement is true or false