Electromagnetic radiation with a frequency of 8.6 x 1014 hz incident on an unknown metal surface causes ejection of photoelectrons with kinetic energies of 1.3 x 10-19 j. what is the unknown metal?

You are a psychic when you tap into your other__% of your brain. HINT:Humans use 80% of their brains

A crow who wants to eat a snail will drop it from a high place to crack the snail's shell and expose the tasty flesh. In order to crack the snail's shell, it must be going 15 m/s when it hits the ground. Assume that the snail free falls.

How can you convert Saturn radii to kilometers?

D=v^0 t+1/2 at^2 the 0 is supposed to be really small right next to the v under it

What two factors does sonar use to determine ocean depth?

Which of the following describes the products of a chemical reaction? A. The original materials B. The chemicals on the right side of a chemical equation C. The chemicals on the left side of a chemical equation D. The substances that are changed

What does it mean when we say an atom has decayed?

The first excited state of a particular atom in a gas is 5.2 eV above the ground state. A moving electron collides with one of these atoms, and excites the atom to its first excited state.

How do your teeth work as a wedge?

According to the Big Bang theory timeline, all matter and energy was compressed into a very small volume at an extremely high temperature. a. True b. False