Conversion of Units: Hydraulicists often express rainfall in acre-feet. This is the amount of water required to cover an area of one acre to a depth of one foot. There are 640.0 acres in a square mile, and 5280 feet in one mile. How many cubic feet are there in one acre-foot?
Fill in the blank(s) with the appropriate word(s).
43,560 ft3
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A rocky leftover planetesimal orbiting the Sun is
A) a comet. B) a meteor. C) an asteroid. D) a meteorite. E) possibly any of the above
A car traveling 60 km/h accelerates at the rate of 4.0 m/s2. How much time is required for the car to reach a speed of 90 km/h?
What will be an ideal response?
Explain the history of emissions shown in Figures 14.12 and 14.16, explaining how the emissions have changed over this time
What will be an ideal response?
A point charge Q = 7.00 × 10-9 C is placed at the origin of an xy-coordinate system. What is the electric field intensity E at a distance of x = 30 cm from this charge? (Use k = 9 × 109 Nm2/C2.)
A) 100 N/C B) 400 N/C C) 500 N/C D) 600 N/C E) 700 N/C