Two pistons push down on the fluid filling two cylinders connected by a narrow hose, as shown in the figure. The area A1 is 1 square inch, and the area A2 is 10 square inches. A force of 4 pounds is exerted downward on piston 1, as shown
The pressure on A1 in psi is
a.
0.25.
b.
0.4.
c.
4.
d.
10.
e.
40.
c
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Basic Postulates: You are riding in a spaceship that has no windows, radios, or other means for you to observe or measure what is outside. You wish to determine if the ship is stopped or moving at constant velocity. How can you do this?
A. You can determine if the ship is moving by determining the apparent velocity of light in the spaceship. B. You can determine if the ship is moving by checking your precision time piece. If it's running slow, the ship is moving. C. You can determine if the ship is moving by lying down and measuring your height. If you are shorter than usual, the ship is moving. D. You should give up because you have taken on an impossible task!
Rilles on the lunar surface were formed by ________.
A. ancient lava flows B. the flow of ancient rivers C. ancient volcano chains D. the impact of small asteroids
A 10-solar-mass main-sequence star will produce which of the following remnants?
A) white dwarf B) neutron star C) black hole D) none of the above
Star A has twice the parallax as Star B. Star A is
A) twice as far as Star B. B) four times as far as Star B. C) eight times as far as Star B. D) half as far as Star B. E) one fourth as far as Star B.