A solid sphere of mass M and radius R rolls down an incline without slipping. Its moment of inertia about an axis through its center of mass is 2MR^{2}/5. At any instant while in motion, its rotational kinetic energy about its center of mass is what fraction of its total kinetic energy ? Answers:
2/5
1/2
1/4
2/7
1/3

What is the frequency of a light wave with a wavelength of 620nm

Answer as quick as ! kate is working on a project in her tech education class. she plans to assemble a fan motor. which form of energy does the motor convert most of its electric energy into? a. light energyb. motion energyc. sound energyd. thermal energy

The dipole moment of the water molecule (h2o) is 6.17x10^-30 c. m. consider a water molecule located at the origin whose dipole moment p points in the +x-direction. a chlorine ion ( of charge-1.60x10^-19c , is located at x=3.00x10^-9m . assume that is much larger than the separation d between the charges in the dipole, so that the approximate expression for the electric field along the dipole axis can be used. a) find the magnitude of the electric force that the water molecule exerts on the chlorine ion. b) what is the direction of the electric force. -x-direction or +x-direction c) is this force attractive or repulsive?