A mixture of red and green pigments appears
A) orange.
B) yellow.
C) magenta.
D) blue.
E) muddy-brown.
Answer: E
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A light bulb operating at a voltage of 120 Volt has a power of 60 W. What is the current flowing through this bulb?
A) 1.5 A B) 2.5 A C) 0.5 A D) 2 A E) 1 A
A camera with a 50.0 mm lens is designed to focus from 1.00 m to infinity. What is the distance of travel of the lens with respect to the film plane over this range of focus?
A. 50.0 mm B. 52.6 mm C. 47.4 mm D. 5.30 mm E. 2.60 mm
When 10 grams of hot water cool by 1°C, the amount of heat given off is
A) 41.9 calories. B) 41.9 Calories. C) 41.9 joules. D) more than 41.9 joules. E) none of the above
Equilibrium: A uniform 1200-N piece of medical apparatus that is 3.5 m long is suspended horizontally by two vertical wires at its ends. A small but dense 550-N weight is placed on the apparatus 2.0 m from one end, as shown in the figure. What are the tensions, A and B, in the two wires?
A. A = 880 N, B = 880 N B. A = 840 N, B = 910 N C. A = 9000 N, B = 8200 N D. A = 910 N, B = 840 N E. A = 8200 N, B = 9000 N