What two things must a measurement include?

The first one is a number but what is the second one?

why is a person who lives in the city able to sleep through the sounds of traffic but awaken to the soft sound of a bird singing?

Watson walks up the stairs on his way to class. He weighs 785 N, and the stairs go up 4.75 m vertically. What is his power output if he climbs the stairs in 11.

The independent variable is typically placed on the (blank) axis of a graph

7. A person pushes on a 5.00 kg box with a force of 15.0 N to the right. As a result, the box moves at a constant speed of 10.0 m/s.

Name three elements that are good conductors of electricity

A flash of white light containing all the colors of the visible spectrum in air shines straight down on the surface of a pool.

A car accelerates uniformly from 0 to 15m/s in 5 s. Calculate acceleration.

Which device would a sleep researcher use to monitor a sleeping person's brain waves?

An experiment is performed to obtain the value of a physical property. If the true (i. e., correct) value of the property is 50 and the measured (i. e., experimental) value is 32, the percent error of the experimental result is:

White moths were found in huge numbers in the city of Birmingham. These moths could be easily camouflaged by the trees. Because of sudden industrial development, the trees in the city were covered with soot.