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?


43,560 ft3

Physics & Space Science

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Clocks on fast-moving spaceship shizzing past Earth appear to run slow when viewed from

A) inside the spaceship. B) Earth. C) Both of these. D) Neither of these.

Physics & Space Science

If the Moon is setting at 6 A.M., the phase of the Moon must be

A) first quarter. B) third quarter. C) full. D) new. E) waning crescent.

Physics & Space Science

An object starts with an initial velocity of 4.0 m/s and accelerates with an acceleration of +4.0 for 6.0 seconds. It then decelerates at -2.0 until its velocity is 4.0 m/s. The total distance covered is

A. 67 m. B. 94 m. C. 105 m. D. 192 m. E. 215 m.

Physics & Space Science

A television advertisement claiming that a product is light-years ahead of its time does not make sense because ________

A) light-years can only be used to talk about light B) it doesn't specify the number of light-years C) it uses "light-years" to talk about time, but a light-year is a unit of distance D) a light-year is an astronomically large unit, so a product could not possibly be so advanced

Physics & Space Science