1020m
Explanation:
Given parameters:
Time = 3 seconds
Velocity of sound = 340m/s
Unknown:
Distance of the lightning = ?
Solution:
Velocity is the rate of change of displacement with time. From the given parameters, we can solve for the distance;
Velocity of sound =
Distance of sound = velocity of sound x time
Distance of sound = 340 x 3 = 1020m
Learn more:
Velocity brainly.com/question/5248528
#learnwithBrainly
Answer:
-2000 J (heat lost)
Explanation:
We can solve the problem by using the 1st law of thermodynamics:
where
is the change in internal energy of a system
Q is the heat absorbed by the system
W is the work done by the system
In this situation, we have
(work done by the student)
(decrease in internal energy)
So the heat is
And the negative sign means the student has lost heat.