How many neutrons does element X have if its atomic number is 40 and its mass number is 160?

Two identical bullets are fired horizontally with the identical velocities. One bullet is fired from a "rifled" barrel which makes the bullet spin along the axis of travel. The other bullet is fired from a smooth-bore barrel which imparts no spin.

The field-line representation of the e-field in a certain region in space is shown below. The dashed lines represent equipotential lines.

Why does a space shuttle turn to the east as rapidly aspossible after launch? consider the Earth's rotation on itsaxis.

A student combined equal amounts of two solutions one solution had a ph of 2 and the other had a ph 12 which would most likely be the resulting ph

In the equation for potential energy, what quanity do you find when you multiply m times g?

The doppler effect is the change in observed frequency due to

Which of the following is NOT a vector quantity? (A) Acceleration (B) Average velocity (C) Linear momentum (D) Potential energy (E) Force

Which of Newton's laws of motion is demonstrated by a hammer pounding a nail into a board

Heated air molecules in a hot air balloon soon carried thermal energy to the top of the balloon. this is an example of ... conduction. Convection. Radiation. Cooling.

When you are ice skating, to get started, you push your skate backwards on the ice and, as a result, begin to move forward. Which law of motion is being described in this scenario?