A propeller is modeled as five identical uniform rods extending radially from its axis. The length and mass of each rod are 0.757 m and 2.81 kg , respectively. When the propellor rotates at 507 rpm (revolutions per minute), what is its rotational kinetic energy

The radius of an atom is closest in size to a

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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?