## College Physics Problem 1.11

Suppose that your bathroom scale reads your mass as 65 kg with a 3%  uncertainty. What is the uncertainty in your mass (in kilograms)?

## College Physics Problem 1.10

a) The average distance between the Earth and the Sun is  10^8 km. Calculate the average speed of the Earth in its orbit in kilometers per second.  b) What is this is meters per second?

## College Physics Problem 1.9

Tectonic plates are large segments of the Earth’s crust that move slowly. Suppose that one such plate has an average speed of 4.0 cm/year. (a) What distance does it move in 1.0 s at this speed? (b) What is its speed in kilometers per million years?

## College Physics Problem 1.2.8

The speed of sound is measured to be  342 m/s on a certain day. What is this in km/h?

## College Physics Problem 1.2.7

Mount Everest, at 29,028 feet, is the tallest mountain on the Earth. What is its height in kilometers? (Assume that 1 kilometer equals 3,281 feet.)

## College Physics Problem 1.2.6

What is the height in meters of a person who is 6 ft 1.0 in. tall? (Assume that 1 meter equals 39.37 in.)

## College Physics Problem 1.2.5

Soccer fields vary in size. A large soccer field is 115 m long and 85 m wide. What are its dimensions in feet and inches?

## College Physics Problem 1.2.4

American football is played on a 100-yd-long field, excluding the end zones. How long is the field in meters? (Assume that 1 meter equals 3.281 feet.)

## College Physics Problem 1.2.3

Show that 1.0 m/s=3.6 km/h. Hint: Show the explicit steps involved in converting 1.0m/s=3.6km/h.

## College Physics Problem 1.2.2

A car is traveling at a speed of 33 m/s . (a) What is its speed in kilometers per hour? (b) Is it exceeding the 90 km/h speed limit?