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 is __________
4 psi
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Rotational Dynamics: A mechanic is examining the wheel of a bicycle to adjust the brake. With the bicycle off the ground, he manually rotates the wheel until it reaches an angular speed of 12.0 rad/s and then allows it to coast to a stop. If the wheel has a moment of inertia of 0.100 kg ? m2, and the wheel slows uniformly to a stop in 160 s, what is the magnitude of the retarding torque?
A. 1.00 N ? m B. 0.00750 N ? m C. 0.0787 N ? m D. 1.33 N ? m E. 1.67 N ? m
The Sun produces energy by fusing hydrogen into helium
Indicate whether the statement is true or false
The ionosphere can be used to conduct radio communications over long distances
a. True b. False Indicate whether the statement is true or false
If a hydrogen atom in the ground state absorbs a photon of energy 12.09 eV, to which energy state will it make a transition?
A) n = 2 B) n = 3 C) n = 4 D) n = 5