Answer:
Blank One: I'm not certain but I'd assume it's either sound or energy.
Blank Two: Louder
Explanation:
volume is controlled by how much energy is put in an area per a unit of time, so the more energy in one area for a unit of time, the louder the sound will come out.
Sorry I couldn't give the best explanation!
Look it up on google copy and paste
Short answer, 10kg, it must be the same mass as Ball 1
Long calculation to prove the answer:
M1 = Mass of Ball 1
M2 = Mass of Ball 2
U1 = Initial speed of Ball 1
U2 = Initial speed of Ball 2
V1 = Final speed of Ball 1
V2 = Final speed of Ball 2
M1U1 + M2U2 = M1V1 + M2V2
10 x 20 + M2 x 20 = 10 x 40 + M2 x 0
200 + 20M2 = 400
20M2 = 200
M2 = 200 / 20
M2 = <u>10 kg</u>
Alternatively you could say that because the velocity of ball 1 increased by the exact velocity of ball 2, their masses must be equal, so both ball 1 and 2 are 10 kg.
Answer:
Situation 2, 4, 5
Since there are five situations I just numbered them 1-5
Pure water. Lemon juice is acidic so it’s not neutral PH it has lower pH Hand soap is basic which makes it have more PH. baking soda is also a basic so it makes it higher ph.