A charge q1 of - 5.00 x 10^-9 C and a charge q2 of - 2.00x 10^-9 C are separated by a distance of 40.0 cm. Find the equilibrium position for a third charge of + 15.0x 10^-9 C.

On a aircraft carrier a jet is slowed from 105 mph to a stop in 2 seconds. What is the rate of deceleration?

An elevator (mass 4500 kg) is to be designed so that the maximum acceleration is 0.0680 g. what is the maximum force the motor should exert on the supporting cable?

How much heat is needed to raise the temperature of a 5.0 gram block of aluminum from 22.0° c to 37.0° c?

A book falls off a 3 meter shelf. How fast will the book go?

A child drags a 0.398 kg toy dog across flat ground at constant speed, with a 4.63 N force at a 63.0° angle. What is the force of friction on the toy? (Hint: You do NOT need to know the coefficient of friction.)

Which of the following water samples would be considered acidic

A linearly-polarized electromagnetic (EM) wave has an electric field with amplitude 1000 V/m. You hold a a linear polarizer in front of it and rotate the polarizer so that all of the EM wave is blocked. You then rotate the polarizer 30 degree.

Let y'=4 x. find all values of r such that y = rx^{2} satisfies the differential equation. if there is more than one correct answer, enter your answers as a comma separated list.

What are the starting materials for nuclear fission

Why is it possible to throw a 0.145 kg baseball much further than a 7 kg bowling ball?