Answer:
False
Explanation:
Let the initial amount is No.
Let t be the half life.
Half life is the time in which the initial amount of the substance becomes half and the remaining amount in teh sample is also half.
After one half life, the remaining amount is No / 2
After two half lives, the remaining amount is No / 4
After three half lives, the remaining amount is No / 8.
So, the statement is false.
Answer:
The net friction force is 8.01 N
Explanation:
Net friction force = mass of hockey puck × acceleration
From the equations of motion
v^2 = u^2 + 2as
v = 40 m/s
u = 0 m/s (puck was initially at rest)
s = 30 m
40^2 = 0^2 + 2×a×30
60a = 1600
a = 1600/60 = 26.7 m/s^2
The acceleration of the puck is 26.7 m/s^2
Net friction force = 0.3 × 26.7 = 8.01 N
Answer:
A
Explanation: I agree with A
The 100% relative humidity in the winter feel nothing like 100% in summer because it depends on "the saturation of the temperature".
<u>Explanation:</u>
Temperature really makes a big difference. Even once warm, a cold winter air produces much less humidity than summer heat. One cubic unit of air needs 0.001 ounces of water to saturate it, to elevate its ratio to one hundred per cent.
Nevertheless, it takes 0.022 ounces of water to saturate the one cubic unit of air once the temperature is eighty, which is twenty-two times that amount of water. Air with a humidity of one hundred percent at eighty degrees holds twenty-two times as much water as air at zero with humidity at one hundred percent.
<span>D transformed into gravitational potential energy.</span>
