A tire pressure gauge reads 30 psi when the atmospheric pressure is 14 psi. The net force on 2 square inches of the tire is
a. 28 lbs.
b. 32 lbs.
c. 60 lbs.
d. 88 lbs.
e. none of these.
c
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In pre-Copernican astronomy, it was almost universally believed that
a. the planets traveled in elliptical orbits about the Earth. b. the center of the universe was the Sun with the Milky Way representing other distant planets. c. the Sun was at the center of the universe. d. the Earth was at the center of the universe. e. None of the above was believed.
Length Contraction: Astronaut Hans leaves Earth in a spaceship traveling at a speed of 0.280c relative to the observer Brian at rest on Earth. Hans is holding a pencil at an angle of 30° with the direction of travel, as seen by Hans. What angle does the pencil make with the direction of travel, as seen by Brian on Earth?
A. 29° B. 30° C. 31° D. 33° E. 90°
PNGs were created because at one point the companies that developed the GIF compression technique required anyone using a GIF to pay a license fee.
Answer the following statement true (T) or false (F)
Light takes approximately one second to travel from the Earth to the Moon. This means that the Moon is approximately
A) 1 astronomical unit from the Earth. B) 300,000 kilometers from the Earth. C) 3,000 kilometers from the Earth. D) 1 light year from the Earth. E) twice the distance from the Earth to the Sun.