Which of the three substances has the greatest permeability?

a. gravel

b. sand

c. silt

d. all are equal?

Which choice is a potential drawback of nanotechnology? check all that apply ideas might not work. research is expensive. there is a high demand for new technology. building and applying new technology is time consuming.

The ability of a material to transfer heat or electric current is called

Fossils found in lower rock layers are generally more what than fossils found in rock layers closer to the surface

What effect would adding additional neutrons have on the forces in a nucleus? A. An increase in the electrostatic force and an increase in the strong nuclear force. B.

True or false The bending of a wave is called reflection (reflection is underlined) If false write the correct for the underline word

X-rays UV light waves Sound waves Earthquake waves. All of these have which characteristic in common?

V=345m/s, 7210Hz, X=?

As a mercury atom absorbs a photon of energy, an electron in the atom changes from energy level d to energy level e. Determine the energy of the absorbed photon in electronvolts.

During an exothermic reaction, the energy given off comes from atoms being consumed mass being burned into energy the breaking and forming of bonds mass being created

Can electrostatic attract both pull and pull?