Physics Answers

An object moving at 15 m/s has a kinetic energy of 8500 J. What must be the speed of the same object that has kinetic energy of 6300 J.

Three identical balls with masses of M, 2M, and 3M are fastened to a massless rod of length L as shown. The rotational inertia about the left end of the rod is ?

Please help. Thank you

Suppose there is an isolated charge (+1.5𝑥10−19𝐶) that is displaced from point A to B due to the electric force. As the charge moves, it produces an electric field which has a magnitude of 6.9 N/C. Find the work done by the electric force of the charge if it moves 1.5 m from its original position.

1. An electric charge inside a sphere (r=0.81m) has a magnitude of +4.8x10−18𝐶. Find the electric flux through this surface.

2. An electric field (E=4.5N/C) passes through a flat surface area (0.30 m) with an angle of 45˚. What will be the magnitude of the electric flux?

3. A closed surface which encloses a charge has an electric flux of 15.8𝑁.𝑚 2 . 𝐶 What is the magnitude of the charge?

Calculate the total force on charge A. All three charges are 2.5uC. The distance from A to B is 2.0 m and from B to C is 2.0 m and angle B is 90°

Two circuits present the same resistance to the current. In one circuit the battery causing the flow of current has a voltage of 9.0 V, and the current is 3.0 A. In the other circuit the battery has a voltage of 1.5 V. What is the current in this other circuit?

how would you relate alchemy to synthesis of new elements?

A string is wrapped around a solid disk of radius R that sits on a frictionless incline with angle theta as shown. The string is pulled up the plane with Tension T in such a way that it unwinds without slipping from the disk and the disk rolls without slipping down the incline. What is the linear acceleration (a) of the the disk down the plane.

Please help. Thank you

In the interval 0°C to 660°C plantinum resistance thermometer is used for interpolating temperature on internation scale. If the variation of resistance with temperature is given by R1=R°[1+at+bt2],find the value of a,b given R°=10π,R100=13.948π and R444.6=24.817π

The Hydrogen Atom: The electron with charge -1.6 X 10 ^-19 C and proton with charge 1.6 X 10 ^-19 C of a hydrogen atom are separated by a distance of approximately 5.3 x 10 ^-11 m. Find the magnitude of the electric force between the two particles.