Which of the following is an example of the electrostatic force acting in an atom?
A. A neutron repelling a proton
B. A neutron repelling an electron
C. An electron repelling another electron
D. A proton repelling an electron

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Aperson standing in a canoe exerts a force of 700 n to throw an anchor over the side. find the acceleration of the canoe if the total mass of the canoe and the person is 100 kg?