Aspeck of dust on a spinning dvd has a centripetal accelera- tion of 20 m/s2. a. what is the acceleration of a different speck of dust that is twice as far from the center of the disk? b. what would be the acceleration of the first speck of dust if the disk's angular velocity was doubled?

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?