The skater with a mass of 50 kg has a velocity of 20 m/s at the bottom of the ramp. How high vertically up the ramp will the skater be able to go? (Round off the acceleration of gravity to 10 m/s/s)
Your
1 m
10 m
20 m
30 m
40 m

they are non-matter

explanation:

they are non-matter. basically, any type of energy or any abstract concept is an example of something that does not matter. other examples include dreams, magnetism, radio, and hate

heat the gas and measure the pressure

prndulum needs thread, weight clock to time swings