If the period of a vibration is doubled the frequency of the wave will be

An object has a weight of 500 on earth what is the mass of this object

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.