How many electrons does calcium lose when forming an ionic bond with another ion?

A material having a refractive index of 1.25 is used to coat a piece of glass (n=1.55). what should be the minimum thickness of this film to minimize reflection of 550nm light.

What would happen if a lightning rod on the roof of a house did not have a wire to the ground? Why?

What happens to a liquid when it loses energy

A tank originally contains 100 gal of fresh water. Then water containing 1/2 lb of salt per gallon is poured into the tank at a rate of 2 gal/min, and the mixture is allowed to leave at the same rate.

The fastest helicopter, the Westland Lynx, can travel 3.33 x 103 m in the forward direction in just 30.0 s. What is the average velocity of this helicopter?

Which element is required for the combustion of fossil fuels? nitrogen hydrogen oxygen carbon

When air pressure is lower what happens to a balloon filled with air

Determine the power input for a motor necessary to lift 300 lb at a constant rate of 7 ft/s. the efficiency of the motor is ϵ = 0.65.

The thermal contact resistance at the interface of two 1-cm thick copper plates is measured to be 0.000056 m2K/W.

A provides resistance in an electric circuit. a. wire b. light bulb c. switch. d. battry