A spring has a spring constant of 256 n/m. how far must it be stretched to give it an elastic potential energy of 48 j?

Three particles are fixed on an x axis Particle 1 of charge q1 is at x a and particle 2 of charge q2 is at x a If their net electrostatic force on particle 3 of charge Q is to be zero what must be the ratio q1 q2 when particle 3 is at x 0.

A wire, of length L = 3.8 mm, on a circuit board carries a current of I = 2.54 μA in the j direction. A nearby circuit element generates a magnetic field in the vicinity of the wire of B = Bxi + Byj + Bzk, where Bx = 6.9 G, By = 2.6 G, and Bz = 1.

A train accelerates from its metropolitan cruising speed of 22 m/s to its countryside cruising speed of 32 m/s. If it takes the train 142 seconds to do this, what is its acceleration? 10 m/s2 14.2 m/s2 4.4 m/s2 0.07 m/s2

An element's atomic number is 55. How many protons would an atom of this element have?

Which of the following are usually not shown in a chemical equation? A. reactants B. physical state C. products D. catalysts

The space shuttle undergoes an acceleration of 53.9 m/s2. How fast is it traveling at the end of 55.2s

Which of the following has the greatest amount of kinetic energy a) slice of pizza b) a person at the top of the stairs c) wind d) a book on a table

Physical properties within a period are more alike than physical properties within a group. True false

A 50-kg box is resting on a horizontal floor. A force of 250 N directed at an angle of 30.0° below the horizontal is applied to the box. The coefficient of static friction between the box and the surface is 0.

As you heat a steak on a grill, what kind of energy are you increasing in the steak?