A glass bottle of soda is sealed with a screw cap. The absolute pressure of the carbon dioxide inside the bottle is 1.80 x 10^5 Pa. Assuming that the top and bottom surfaces of the cap each have an area of 4.10 x 10-4 m^2, obtain the magnitude of the force that the screw thread exerts on the cap in order to keep it on the bottle. The air pressure outside the bottle is one atmosphere.
A steam turbine operates at a boiler temperature of 471.0 k and an exhaust temperature of 286.5 k. a) What is the maximum theoretical efficiency of this system? b) If the system operates at maximum efficiency and the boiler expels 20.0 kJ of energy to the cold reservoir, how much energy does it absorb from the hot reservoir?
A rigid body rotates about a fixed axis with a constant angular acceleration. Which one of the following statements is true concerning the tangential acceleration of any point of the body?
A) The tangential acceleration is zero m/s².
B) The tangential acceleration depends on the angular velocity.
C) The tangential acceleration is equal to the centripetal acceleration.
D) The tangential acceleration is constant in both magnitude and direction.
E) The tangential acceleration depends on the change in the angular velocity.