What is an object that allows some electrons to go through it

A painter of mass 70kg climbs 3.0 m up a ladder. the painter potential energy has increased by?

What is a measure of how fast you are traveling and includes a direction.

Your car is initially at rest when your hit that gas and the car begins to accelerate. The forward force on the car is 2830 N while the resisting forces total 130 N. The car has a mass of 1830 kg and the acceleration lasts for 2.8 s.

What is the layer of the earth that consists of the crust and upper mantle?

Which of the following relationships is correct? a. Relative humidity increases: a decrease in temperature without a change in the amount of water vapor in the atmosphere. b.

The vapor pressure of ethanol at 25 degrees C is 7.83 kPa. Calculate the vapor pressure in atm. Round answer to 3 significant digits.

According to Newton's second law of motion acceleration or an object depends upon the ___ of the object and the ___ Acting on it. I'm confused on what the blanks are. I can't find them.

What is the concentration of H + ions at a pH = 7?

Suppose that Paul D. Trigger fires a bullet from a gun. Will the speed of the bullet leaving the muzzle will be the same as the speed of the recoiling gun? Explain.

A certain rock contains large jagged pieces of other rocks cemented by fine particles what type of rock is this explain