Find the uncertainty in kinetic energy. Kinetic energy depends on mass and velocity according to this function E(m, v) = 1/2 m v2. Your measured mass and velocity have the following uncertainties 0.37 kg and 0.42 m/s. What is is the uncertainty in energy, , if the measured mass, m = 1.06 kg and the measured velocity, v = -1.28 m/s? Units are not needed in your answer.

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?