Questions from College Physics

Q: An automobile tire is rated to last for 50000 miles. Estimate

An automobile tire is rated to last for 50000 miles. Estimate the number of revolutions the tire will make in its lifetime.

Q: A study from the National Institutes of Health states that the human

A study from the National Institutes of Health states that the human body contains trillions of microorganisms that make up 1% to 3% of the body’s mass. Use this information to estimate the average ma...

Q: A point is located in a polar coordinate system by the coordinates

A point is located in a polar coordinate system by the coordinates r = 2.5 m and θ = 35°. Find the x- and y- coordinates of this point, assuming that the two coordinate systems have the same origin....

Q: An object with a mass of 1 kg weighs approximately 2 lb

An object with a mass of 1 kg weighs approximately 2 lb. Use this information to estimate the mass of the following objects: (a) a baseball (b) your physics textbook (c) a pickup truck.

Q: A certain corner of a room is selected as the origin of

A certain corner of a room is selected as the origin of a rectangular coordinate system. If a fly is crawling on an adjacent wall at a point having coordinates (2.0, 1.0), where the units are meters,...

Q: Use the rules for significant figures to find the answer to the

Use the rules for significant figures to find the answer to the addition problem 21.4 + 15 + 17.17 + 4.003.

Q: Use your calculator to determine (√8)3 to three significant

Use your calculator to determine (√8)3 to three significant figures in two ways: (a) Find √8 to four significant figures; then cube this number and round to three significant figures. (b) Find √8 to...

Q: The speed of light is now defined to be 2.997

The speed of light is now defined to be 2.997 924 58 x 108 m/s. Express the speed of light to (a) Three significant figures, (b) Five significant figures, and (c) Seven significant figures.

Q: The radius of a circle is measured to be (10.

The radius of a circle is measured to be (10.5 ± 0.2) m. Calculate (a) the area and (b) the circumference of the circle, and give the uncertainty in each value.

Q: Carry out the following arithmetic operations: (a) the

Carry out the following arithmetic operations: (a) the sum of the measured values 756, 37.2, 0.83, and 2.5 (b) the product 0.003 2 x 356.3 (c) the product 5.620 x π.