The property are on there hope this helps
Answer:
1320
Explanation:
There are 60 seconds per minute so just multiply 22 by 60.
Answer:
127.12 m/s
Explanation:
From the question,
Kinetic energy of the bowling ball = Kinetic energy of the ping pong ball
1/2mv² = 1/2m'v'²
Where m = mass of the bowling ball, v = velocity of the bowling ball, m' = mass of the ping pong ball v' = velocity of the ping pong ball
make v' the subject of the equation
v' = √(mv²/m')................ Equation 2
Given: m = 7.0 kg, v = 2.45 m/s, m' = 2.60 g = 0.0026 kg
Subtitute into equation 2
v' = √[(7×2.45²)/0.0026]
v' = √16160.57
v' = 127.12 m/s
At high altitudes, the air pressure is lower and it is more difficult for us to breathe because we cannot take in enough oxygen.
Question:
Calculate the change in internal energy of the following system: A balloon is cooled by removing 0.652 kJ of heat. It shrinks on cooling, and the atmosphere does 389 J of work on the balloon. Express your answer in Joules (J)
Answer:
-263J
Explanation:
Though its difficult and infact impossible to measure the internal energy of a system, the change in internal energy ΔE, can however be determined. This change when it is accompanied by work(W) and transfer of heat(Q) in or out of the system, can be calculated as follows;
ΔE = Q + W ----------------(i)
Q is negative if heat is lost. It is positive otherwise
W is negative if work is done by the system. It is positive otherwise.
From the question;
Q = -0.652kJ = -652J {the negative sign shows heat loss}
W = +389J {the positive sign shows work done on the system(balloon)}
<em>Substitute these values into equation (i) as follows;</em>
ΔE = -652 + 389
ΔE = -263J
Therefore the change in internal energy is -263J
PS: The negative sign shows that the process is exothermic. This means that the system (balloon) lost some energy to the environment.