Assume everyone in the United States consumes one soft drink in an aluminum can every two days. If there are 270 million Americans, about how many tons of aluminum need to be recycled each year if each can weighs 1/15 pound and one ton = 2 000 pounds?
a. 450 000 tons
b. 1.6 million tons
c. 3.3 million tons
d. 0.82 million tons
e. 410 000 tons
b
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The seeds of protogalaxies were comparable in mass to the ________
Fill in the blank(s) with correct word
A person throws a ball horizontally from the top of a building that is 24.0 m above the ground level. The ball lands 100 m down range from the base of the building. What was the initial velocity of the ball? Neglect air and use g = 9.81 m/s2
A) 202 m/s B) 9.80 m/s C) 19.6 m/s D) 45.2 m/s E) 94.4°
If the headlights on a car are separated by 1.3 m, how far down the road can they be resolved if the angular resolution of the eye is 5.0 × 10-4 rad and the person has excellent vision?
A) 1.3 km B) 5.0 km C) 4.8 km D) 0.65 km E) 2.6 km
If the momentum of an object is tripled, its kinetic energy will change by what factor?
a. zero c. three b. one–third d. nine