What is the steady state rate of heat flow through a pane of glass that is 40.0 cm by 30.0 cm with a thickness of 4.00 mm when the outside temperature of the glass is -10.0°C
and its inside temperature is 25.0°C? The thermal conductivity of glass is 0.105 W/(m?K), the specific heat of glass is 0.180 cal/(g?°C), and 1 cal = 4.190 J.
A) 24.2 W
B) 3.81 W
C) 18.6 W
D) 47.3 W
E) 110 W
E
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A) rise. B) fall. C) remain unchanged.
Which large jovian moon is thought to have been captured into its present orbit?
A) Callisto B) Titan C) Triton D) Io
An automobile of mass 2000 kg moving at 20 m/s is braked suddenly with a constant braking force of 10,000 N. How far does the car travel before stopping?
a. 40 m c. 120 m b. 80 m d. 160 m
A mass (M1 = 5.0 kg) is connected by a light cord to a mass (M2 = 4.0 kg) which slides on a smooth surface, as shown in the figure. The pulley (radius = 0.20 m) rotates about a frictionless axle. The acceleration of M2 is 3.5 m/s2. What is the rotational inertia of the pulley?
?
?
A. 0.29 kg?m2 B. 0.42 kg?m2 C. 0.20 kg?m2 D. 0.62 kg?m2 E. 0.60 kg?m2