Power = Energy / time, The time is the one it takes to cover 25 km at 65 km/h, so: time = 25/65*60*60 = 1384.6 seconds.
Now the total energy needed for that is: Energy = Power * time = 15,000 * 1384.6 = 20769239.8 J.
The heat provides those J. The heat for a difference in temperature is:
Heat = mass * c_h * Difference_of_temperature,
Heat = 350 * 9,800 * (T-15)*0.88,
where the 0.88 is because some of the heat is lost, efficiency 88%. Now, you can equal both results and get T:
350*9,800*0.88*(T-15) = 20769239.8
T-15 = 6.88, and T = 21.88 C
The answer is T= 21.88 C
NB: this specific heat, 9,800, is more than 2,000 time sthat of water, it is really a substance that does not exist,. It seems He has the highest (5,300) but it's a gas!
The point In the motion that the balls will be closest to each other is as at the time as the second ball is thrown or lunched.
<h3>Will the first ball always be travelling faster than the second ball?</h3>
No, The two motions are said to be parallel to one another, so they that they both the same timing. Hence, the time it takes for both balls to be able to fall to the ground is said to be the same.
Yes, the both balls have the same speed because of two balls are said to hit the ground, they are said to be done at the same height as well as the same energy and so they have the same speed.
Note that balls will take about 2 seconds to be able to hit the ground.
The horizontal projection velocity of the second ball can be changed so that the balls arrive at the ground at the same time and so the balls will be closest to one another if the second ball is thrown.
Learn more about projection velocity from
brainly.com/question/4582453
#SPJ1
Answer:
you may get bullied or teased for being a differrent race, ethnic.
Answer:
2.3 Nm clockwise
Explanation:
Take counterclockwise to be positive and clockwise to be negative.
∑τ = (3 N) (2.5 m) − (7 N) (1.4 m)
∑τ = 7.5 Nm − 9.8 Nm
∑τ = -2.3 Nm
The net torque is 2.3 Nm clockwise.
Hélène de Pourtalès she was the first women
