Select all the correct answers.
which two statements are true?
the definitions for electric force and electromagnetic force are identical.
electric forces and magnetic forces are different aspects of a single electromagnetic force.
the operation of a motor depends on the relationship between electric and magnetic forces.
d
a magnet must be moving for a magnetic force field to exist.

Asmall metal bar, whose initial temperature was 10° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70° c if it is known that its temperature increases 2° during the first second? (the boiling temperature for water is 100° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98° c? (round your answer to one decimal place.)

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?