Astar begins as a blank a large cloud of gas and dust

How much energy will an electron gain if it moves through a potential difference of 1.0 V? a. 1.0 eV b. 0.5 eV c. 2.0 eV d. 1.6 x 10-19 eV

Photons are also known as beta particles. (true or false)

The first law of thermodynamics states energy is not created or destroyed, so why must we ensure that the energy resources of the planet are conserved?

Which of the following elements is an alkali metal? Select one: a. magnesium b. sodium c. calcium d. mercury

Which subatomic particle determines the identity of the element?

An object has an acceleration of 24 m/s/s. How long would it take the stationary object to reach a velocity of 6.8 m/s?

What is normal distribution in statistics?

Which of the following water samples would be considered acidic

A linearly-polarized electromagnetic (EM) wave has an electric field with amplitude 1000 V/m. You hold a a linear polarizer in front of it and rotate the polarizer so that all of the EM wave is blocked. You then rotate the polarizer 30 degree.

Let y'=4 x. find all values of r such that y = rx^{2} satisfies the differential equation. if there is more than one correct answer, enter your answers as a comma separated list.