Element used in bright flashing signs

In what era did the first land plants appear?

Which option is an example of a chemical property

Which are examples of transverse waves? Check all that apply. earthquake P-waves earthquake S-waves radio waves sound visible light X-rays

Identify which sets of Quantum Numbers are valid for an electron. Each set is ordered (n,ℓ, mℓ, ms). 3,2,0,1/2 2,2,-1, 1/2 4,3,-4,1/2 1,0,0,1/2 2,2,1,-1/2 3,2,1,1 0,1,1,-1/2 3,3,1,1/2 2,-2,-2,-1/2 3,2,2,1/2 4,2,1,1/2 2,1,-1,-1/2

1. A 24 kg rock is resting on the floor. How much potential energy does it have? Explain.

Convert 59°c to farenheit

Heat is transferred from one particle of matter to another without the movement of matter itself in a process called

How would you find the speed of a ball thrown in to the air - it takes 6 seconds to get tho the top. The height is not given.

Choose all the answers that apply. The sun: - is the largest star in our solar system - is the largest star in our galaxy - is made mostly of hydrogen and helium -will eventually run out of fuel and die -creates energy through nuclear reactions

Calculate the kinetic energy of a truck that has a mass of 2900kg and is moving at 55m/s.