Fig. 10-3 illustrates a simplified roller bearing. The outer hollow cylinder has a radius of 1.2 cm and is stationary. The inner cylinder has a radius of 1.0 cm and is rotating at 11 rpm
Between the two cylinders are several small cylinders with a radius of 0.10 cm, which roll without slipping on both the inner and outer cylinders. Only one of these cylinders is shown in the figure. What is the angular speed of the small cylinders? A)
12 rpm
B)
10 rpm
C)
20 rpm
D)
62 rpm
E)
55 rpm
E
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__________is a possible form of dark energy that can change in strength as the Universe ages
A) Microwave B) Quintessence C) Isotope D) Redshift
____ is the separation of material in a newly formed planet or asteroid according to density. This happens when the object becomes molten
a. Accretion b. Differentiation c. Condensation d. Outgassing e. Sublimation
Because of __________, ___________, and ___________, physical interstellar travel is currently impossible
Fill in the blank(s) with correct word
Free Fall: When a ball is thrown straight up with no air resistance, the acceleration at its highest point
A. is upward. B. is downward. C. is zero. D. reverses from upward to downward. E. reverses from downward to upward.