Which of the following is a physical quantity that has a magnitude but no direction?

a. vector

b. scalar

c. resulant

d. frame of referance

Is converting frost to water vapor an exothermic or endothermic?

A plane is flying east at 115 m/s. The wind accelerates it at 2.88 m/s^2 directly northwest. After 25.0 seconds what is the direction of the velocity of the plane?

Which of these is most likely to produce radioactive waves? A. A nuclear power plant B. A paper mill C. An oil refinery D. A leather tannery

What force works against gravity as water infiltrates the soil and moves underground?

Which period of rock art in africa was the first to develop?

In the diagrams, the solid green line represents Earth's rotational axis and the dashed red line represents the magnetic field axis. Which diagram accurately shows Earth's magnetic field?

In order for natural selection to occur, Charles Darwin stated we must begin with a population of organisms that has genetic A) competition. B) engineering. C) reproduction. D) variation.

How fast must a 6 kg cat run to have kinetic energy of 150 j?

Alleles are variations of genes. How are they expressed? A. repetitive or creative B. major or minor C. temporary or permanent D. dominant or recessive

Which statement about electric force is true?