The mantle in the Earth continually heats up and cools down using convection currents.

a. True

b. False

The temperature of a 50 g sample of aluminum is raised from 20°c to 60°c when 440 cal of heat are added. the specific heat capacity of the aluminum is

Which of the following statements is true

Two pieces of flint rock produce a visible spark when they are struck together. During this process, mechanical energy is converted into (1) nuclear energy and electromagnetic energy (2) internal energy and nuclear energy (3) electromagnetic energy

Why do we need food even we lying in bed

The second harmonic of a guitar string has a frequency of 120 hz. what is the length of the guitar string if the speed of the waves on the string is 110 m/s?

Red light has a shorter wavelength than yellow light.

Approximately what is the parallax angle of a star that is 20 light-years away?

If the Earth and distant stars were stationary (motionless) in space, what would we observe about the wavelength from these stars? A. Wavelengths measured would match the actual wavelengths emitted. B.

Two fire trucks with sirens speeds towards and away from an observer. Which statement is true involving the Doppler effect observed by the observer?

What warm ocean currents keep the NC coast warm, even if it is winter