Burning involves a chemical change. true or false

Mixtures can occur between all phases of matter. Give an example for each of the following mixtures: 1. Gas/gas 2. Gas/liquid 3. Liquid/liquid 4. Solid/liquid 5. Solid/solid

7. Nancy has a mass of 60 kg and sits on the very end of a 3.00 m long plank pivoted in the middle. How much torque must her co-worker provide on the other end of the plank in order to keep Nancy from falling on the ground?

the acceleration of a body in free fall depends on the place or the world in which it is, true or false?

Which of the following is not a depositional shoreline feature

A Cassegrain telescope has a hole in the main mirror. This reduces the mirror area and thus the light gathering power, but how much? Suppose a ten inch diameter mirror has a one inch diameter hole in the center.

When studying atoms, scientists can ignore the blank force between charged particles that make up the atoms because it is many millions of times smaller than other forces in the atom

Burning involves a chemical change. true or false

What is the fate of the universe knowing that heat flow from hot to cold until there is equilibrium of temperature?

Limestone chips dissolve after they are placed in a beaker of dilute acid. Which geologic process is this most similar to?

In air an object weighs 15N. when immersed in water it weighs 12N. when immersed in another liquid it weighs 13N. determine the density of d object and that of d other liquid