As a dry cell ages, its internal resistance goes up
Indicate whether the statement is true or false
TRUE
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Neptune has a radius of 2.48 ×107 m and an escape velocity of 23,300 m/s. What is the mass of Neptune? G = 6.67 x 10-11 N•m2/kg2
A) 1.01 × 1026 kg B) 2.02 × 1026 kg C) 3.03 × 1026 kg D) 4.04 × 1026 kg E) 5.05 × 1026 kg
A bike (shown in a top view in the diagram) travels around a curve with its brakes on, so that it is constantly slowing down. Which of the arrows shown most closely approximates the direction of the bike’s acceleration at the instant it is at the position shown? (Hint: Draw a motion diagram.)
A. A
B. B
C. C
D. D
E. E
F. F
T. T
Breaking a bar magnet in half will produce
A) one North and one South monopole. B) a single North magnetic monopole. C) a single South magnetic monopole. D) two bar magnets.
A 3.00-kg block of silicon at 60.0°C is immersed in 6.00 kg of mercury at 20.0°C. What is the entropy increase of this system as it moves to equilibrium?
The specific heat of silicon is 0.17 cal/(g?K) and the specific heat of mercury is 0.033 cal/(g?K). A) 8.8 × 10-1 J/K B) 4.8 J/K C) 6.9 J/K D) 5.2 × 10-2 J/K E) -0.46 J/K