A 400-g piece of metal at 100°C is dropped into a 100-g aluminum cup containing 500 g of water at 15°C. The final temperature of the system is 40°C
What is the specific heat of the metal, assuming no heat is exchanged with the surroundings? The specific heat of aluminum is 900 J/(kg?K) A) 1900 J/(kg?K)
B) 2270 J/(kg?K)
C) 3300 J/(kg?K)
D) 3800 J/(kg?K)
E) 4280 J/(kg?K)
B
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Weight and g: A hypothetical planet has a mass of one-half that of the earth and a radius of twice that of the earth. What is the acceleration due to gravity on the planet in terms of g, the acceleration due to gravity at the surface of the earth?
A. g B. g/2 C. g/4 D. g/8 E. g/16
Lower compression values lead to a greater loss of image data.
Answer the following statement true (T) or false (F)
A projectile that is fired vertically at 5 km/s from the Earth's surface will
A) go into a circular orbit about Earth. B) go into an elliptical orbit about Earth. C) rise and fall back to Earth's surface. D) none of the above
The information on a one-gallon paint can is that the coverage, when properly applied, is 270 ft2 . One gallon is 231 in3 . What is the average thickness of the paint in such an application?
a. 0.0036 in. c. 0.043 in. b. 0.0059 in. d. 0.053 in.