Questions from College Physics

Q: A furlong is 220 yd.; a fortnight is 14 d.

A furlong is 220 yd.; a fortnight is 14 d. How fast is 1 furlong per fortnight (a) in µm/s? (b) in km/d?

Q: In the United States, we often use miles per hour (

In the United States, we often use miles per hour (mi/h) when discussing speed, but the SI unit of speed is m/s. What is the conversion factor for changing m/s to mi/h?

Q: Two thieves, escaping after a bank robbery, drop a sack

Two thieves, escaping after a bank robbery, drop a sack of money on the sidewalk. Estimate the mass if the sack contains $1 000 000 in $20 bills.

Q: The weight W of an object is given by W = mg

The weight W of an object is given by W = mg, where m is the object's mass and g is the gravitational field strength. The SI unit of field strength g, expressed in SI base units, is m/s2. What is the...

Q: Kepler's third law of planetary motion says that the square of the

Kepler's third law of planetary motion says that the square of the period of a planet (T2) is proportional to the cube of the distance of the planet from the Sun (r3). Mars is about twice as far from...

Q: One morning you read in the New York Times that a certain

One morning you read in the New York Times that a certain billionaire has a net worth of $59 000 000 000. Later that day you see her on the street, and she gives you a $100 bill. What is her net worth...

Q: The average depth of the oceans is about 4 km, and

The average depth of the oceans is about 4 km, and oceans cover about 70% of Earth's surface. Make an order-of-magnitude estimate of the volume of water in the oceans. Do not look up any data. (Use yo...

Q: Suppose you have a pair of Seven League Boots. These are

Suppose you have a pair of Seven League Boots. These are magic boots that enable you to stride along a distance of 7.0 leagues with each step. (a) If you march along at a military march pace of 120 p...

Q: A car has a gas tank that holds 12.5 U

A car has a gas tank that holds 12.5 U.S. gal. Using the conversion factors from Appendix B. (a) determine the size of the gas tank in cubic inches. (b) A cubit is an ancient measurement of length th...

Q: The weight of an object at the surface of a planet is

The weight of an object at the surface of a planet is proportional to the planet's mass and inversely proportional to the square of the radius of the planet. Jupiter's radius is 11 times Earth's, and...