What most closley defines population density?

A 150 cm long string vibrates with 3 loops and its frequency is 80 Hz. What will be the wavelength and velocity of the waves?

An engineer in India (standard household voltage = 220 volts) is designing a transformer for use on her upcoming trip to Canada (standard household voltage = 120 volts). If her input coil has 240 turns, how many turns should her output coil have?

Which of the following is the correct SI unit to use in measuring amount of material contained in a solid sphere? A) kilograms B) ounces C) pounds D) tons

A force of 8480 is applied to a car to decelerate it at a rate of 32.0 m s squared. What is the mass of the car?

The radius of the earth's very nearly circular orbit around the sunis 1.5/times10^11 m. Find the magnitude of the earth's velocity as it travels around thesun. Assume a year of 365 days. Express your answer using two significant figures.

Two kids are on a merry-go-round that is turning at a constant rate. ariel is near the outer edge, and bob is closer to the center. ariel has answer (smaller, the same, or greater angular speed?

Visit this website and locate the element mercury, whose chemical symbol is Hg. Click on the square to read about the history, properties, and uses of mercury. Name three uses for mercury.

Ten seconds after starting from rest, a car is moving at 40 m/s. what is the car's acceleration in meters per second per second?

A student builds a simple circuit and a magnet under one of the circuit wires. When the switch is closed charges flow int the circuit and the wire moves

Cite an example in which a force is exerted on an object without doing work on the object