A solid cylinder and a hollow cylinder have the same mass and the same radius. Which statement is true concerning their moment of inertia about an axis through the exact center of the flat surfaces?
A) The hollow cylinder has the greater moment of inertia.
B) The solid cylinder has the greater moment of inertia.
C) Both cylinders have the same moment of inertia.
D) The moment of inertia cannot be determined since it depends on the amount of material removed from the inside of the hollow cylinder.
A
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A 1000.0 kg car is moving at If a truck has 18 times the kinetic energy of the car, how fast is the truck moving?
A) 45 km/h B) 63 km/h C) 54 km/h D) 36 km/h
A nonrelativistic electron and a nonrelativistic proton have the same de Broglie wavelength. Which of the following statements about these particles are accurate? (There may be more than one correct choice.)
A) Both particles have the same speed. B) Both particles have the same kinetic energy. C) Both particles have the same momentum. D) The electron has more kinetic energy than the proton. E) The electron has more momentum than the proton.
The separation of the strong force and the electroweak force ____
a. provided the energy for a rapid inflation of the early Universe b. created the cosmic microwave background radiation c. balanced the critical density of the Universe to solve the flatness problem d. created dark matter e. created dark energy
Two flat rectangular mirrors are set edge to edge and placed perpendicular to a flat nonreflecting surface. The edges of the two mirrors meet at a 30° angle. A light ray that approaches mirror 1 is parallel to mirror 2 . The angle of reflection of that ray from mirror 1 is a. 0°
b. 30°. c. 60°. d. 90°. e. 120°.