Answer: 18 m/s/s
Explanation:
3 times 6 equals 18 and 3 seconds every second makes this equation
Potential energy is a relative measure, so the answer is dependent on the assumptions we make. The potential energy in the car is going to be gravitational potential energy(PE). PE = mgh, where m is the mass, g is 9.8 m/s^2, and h is the height. So PE = 2000*9.8*h = 19600h. The final answer obviously depends on h. Most likely the problem is assuming that 30 meters under the top of the hill is considered 0 meters. Then h would be 30m and PE would equal 588 kJ.
Explanation:
The given data is as follows.
= 400 K,
= 500 K,
= 25 kJ = 25000 J (as 1 kJ = 1000 J)
Now, we will calculate the change in entropy as follows.

Putting the given values into the above formula as follows.

=
= 250 J/K
Hence, we can conclude that change in entropy is 250 J/K.
Note : Be careful with speed and velocity, even the formula is same that

1. If we would like to find the velocity, we must calculate the distance from initial to final,

,
2. If we would like to find the speed, we must calculate the total distance that travelled (

.
So, in this question, because it return back to its initial point so (delta)x = 0, so average velocity is 0 m/s.
Answer: I think it’s actually a
Explanation: water only rises when it’s warm and the will condense as it gets colder