A block of ice at 0°C is added to a 150-g aluminum calorimeter cup that holds 200 g of water at 10°C. If all but 2.00 g of ice melt, what was the original mass of the block of ice?
A)
31.1 g
B)
35.6 g
C)
38.8 g
D)
42.0 g
E)
47.6 g
A
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A charge of 2.0 ?C flows onto the plates of a capacitor when it is connected to a 12. V battery. How much work was done in charging this capacitor?
A) 24. ?J B) 12. ?J C) 48. ?J D) 0.14 mJ E) 21. ?J
A puddle of water has a thin film of gasoline floating on it. A beam of light is shining perpendicular on the film
If the wavelength of light incident on the film is 560 nm and the indices of refraction of gasoline and water are 1.40 and 1.33, respectively, what is the minimum thickness of the film to see a bright reflection? A) 100 nm B) 200 nm C) 300 nm D) 400 nm E) 500 nm
Most of the mass of our galaxy lies between Earth and the Galactic center
Indicate whether the statement is true or false
The element that is the second most abundant in Earth's crust is
a. oxygen. b. iron. c. nitrogen. d. silicon.