What is matter?

A. Anything that has mass and takes up space

B. Something that has volume and takes up space.

C. Things that have energy and take up space

D. Things that take up space but don't have mass

Does an electron cloud swirl around the inside of an atom? True or false?

A. Which date shows a waning crescent?

Why does permeable rock weather more than less permeable rock

What property of water allows it to stick to a dry surface, such as a wooden countertop?

Calculate the velocity of a neutron needed to achieve a wavelength of 1.40 å. (take the mass of the neutron m=1.6749*10-27kg). v = m/s

How are electromagnetic different than all other waves

Find the ratio of speeds of an electron and a negative hydrogen ion (one having an extra electron) accelerated through the same voltage, assuming non-relativistic final speeds. Take the mass of the hydrogen ion to be 1.67*10^{-27} kg.

A type of rock that undergoes changes because of heat and pressure

How many milliliters of a 1.25 molar HCL solution would be needed to react completely with 60 g of calcium metal Ca+2HCl - - > CaCl2 + H2

What mass of copper is required to replace silver from 4. oog ogre silver nitrate dissolved in water