If a substance can be separated by physical means and it is not the same through, what is it?

A) element

B) compound

C) homogeneous solution

D) heterogeneous solution

Scientist accept ideas of the past and do not try to revise or change them

In order for a sound wave to travel, it must have ___?

The equation for photosynthesis is 6H2O (water) + 6CO2 (carbon dioxide) + Light Energy → C6H12O6 (glucose) + 6O2 (oxygen). When first discovered, scientists were trying to decide if the oxygen in the product came from carbon dioxide or water.

What happens when the moon faces one side of the earth tides?

You throw a ball straight up into the air at a speed of 15 m/s. You want to know how high above your hand the ball will be at exactly 2.5 sec after you released it.

Witch statement about polymers is true

Two bullets have masses of 3,0 g and 6.0g, respectively. both are fired with a speed of 40.0 m/s. Which bullet has more kinetic energy? What is the ratio of their kinetic energies

What does it mean that a form of energy might take more energy to harness than it provides? Are renewable resources always renewable, or can they become non-renewable? Why aren't renewable resources used for everything that we use energy for?

What would a sound wave do if it traveled from a gas to a liquid? •stop •stay the same speed •slow down •speed up

A rock is thrown downward into a well that is 7.92 m deep. Part A If the splash is heard 1.17 seconds later, what was the initial speed of the rock? Take the speed of sound in the air to be 343 m/s.