Power is defined as the rate of work per time, power = work/time. If the dimensions of power are [ML2T-3], what are the dimensions of work?
A)
[MLT-3]
B)
[ML2T-1]
C)
[ML3T-3]
D)
[ML2T-2]
E)
[ML2T-4]
D
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Which of the following describes what will happen to a light ray incident on a glass-to-air boundary at greater than the critical angle?
a. partial reflection, total transmission b. total transmission c. total reflection d. partial reflection, partial transmission
An 8 000-kg aluminum flagpole 100-m long is heated by the sun from a temperature of 10°C to 20°C. Find the heat transferred (in J) to the aluminum if the specific heat of aluminum is 0.215 cal/g/°C
a. 7.2 × 10^5 b. 7.2 × 10^7 c. 7.2 × 10^3 d. 7.2 × 10^1 e. 7.2 × 10^2
What is the number of molecules of O2 consumed if you combust one mole of CH4 according to the following balanced equation?
CH4 + 2 O2 ? CO2 + 2 H2O A) 1 molecule B) 2 molecules C) 6.022 × 1023 molecules D) 1.204 × 024 molecules E) 1 g of molecules
Potential Energy: A point charge of +3.00 ?C and a second charge Q are initially very far apart. If it takes 29.0 J of work to bring them to a final configuration in which the +3.00-?C charge is at the point x = 1.00 mm, y = 1.00 mm, and the second charge Q is at the point x = 1.00 mm, y = 3.00 mm, find the magnitude of the charge Q. (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A. 2.15 ?C B. 4.30 ?C C. 10.74 ?C D. 4.30 nC