Radioactivity was discovered in about

How does energy change from one form into another inside an animal?

You discover a Cepheid variable star with a 30 day period in the Milky Way. Through careful monitoring for a few years with the Hubble Space Telescope, you determine that it has a parallax of 0.004 arcseconds.

A rollercoaster car reaches a velocity of 2 m/s at the top of a hill and begins to accelerate down the hill. 4.5 seconds later it has reached the bottom of the hill and is traveling with a velocity of 11 m/s.

An ionic compound is a compound that consists of molecules made of atoms that are covalently bonded. True or False?

Gauss's law is usualy written as: ∫Φ_E = E * dA = qencl / ε0 what does qencl refers in Guass's law? O the net charge inside the closed surface O the charge residing on insulators inside the closed surface O all the charge in the physical system O

Power=170 watts time=20 seconds

What is the charge of alpha, beta and gamma rays?

A pair of scissors is a complex machine. what simple machines make up a pair of scissors?

Methane gas absorbs red light, and methane clouds reflect blue light, giving Uranus and Neptune their distinctive blue colors. Why do Uranus and Neptune have methane clouds, but Jupiter and Saturn do not

A car traveled 1025 kilometers from El Paso to Dallas in 13.5 hours. What was it's average velocity?