A very efficient engine has the following characteristics - combustion
exhaust 
cal of fuel produces
of work in one hour. What is the output in hp?
A. 5.2 hp
B. 8.1 hp
C. 7.3 hp
D. 6.3 hp
A. 5.2 hp
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Three point charges, q1, q2, and q3, are arranged so the potential energy for the pair q1 and q2 is 0.12 J and for the pair q2 and q3 is 0.23 J. What is the potential energy for the pair q1 and q3?
A. 0.11 J B. -0.11J C. 0.35 J D. -0.35 J E. insufficient information is given for a unique answer
What is the approximate width of the region inside the black square?
This frame from Figure 16.12 is from a supercomputer model of the formation of one of the first stars in the universe. Color indicates gas temperature: Blue and green represent cool gas (100—300 K), orange and red represent warm gas (500—3000 K), and yellow represents gas at intermediate temperatures (300—500 K). Use the information in the figure to answer the following questions.
A beam of light is incident upon a flat piece of glass (n = 1.50) at an angle of incidence of 37.2°. Part of the beam is transmitted and part is reflected. What is the angle between the reflected and transmitted rays?
a. 23.8° b. 103° c. 119° d. 61.0° e. 127°
The Moon revolves eastward around Earth every ______________ solar days
Fill in the blank(s) with correct word