Earth's gravitational potential energy: GPE = mgh = Gravity (9.81m/s2) * Mass (kg) x Height (m)
Kinetic energy: KE= Imov?
How do the mass and speed of an object affect the kinetic energy?

as mass and the square of speed is directly proportional to the the kinetic enegry so, more there will be mass and speed there will be more kinetic enegry.

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e