Answer
given,
high temperature reservoir (T_c)= 464 K
efficiency of reservoir (ε)= 25 %
temperature to decrease = ?
increase in efficiency = 42 %
now, using equation




T_C = 348 K
now,
if the efficiency is equal to 42$ = 0.42



Answer:
The maximum speed at which the car can safety travel around the track is 18.6m/s.
Explanation:
Since the car is in circular motion, there has to be a centripetal force
. In this case, the only force that applies for that is the static frictional force
between the tires and the track. Then, we can write that:

And since
and
, we have:

Now, if we write the vertical equation of motion of the car (in which there are only the weight and the normal force), we obtain:

Substituting this expression for
and solving for
, we get:

Finally, plugging in the given values for the coefficient of friction and the radius of the track, we have:

It means that in its maximum value, the speed of the car is equal to 18.6m/s.
Answer:to transfer electric current from one point to another
Explanation:
To transfer electric current from one point to another
Answer:
200.048 kg
Explanation:
Total Black dirt loaded in the pickup (A) = 260.5 kg = 260.500 kg
Quantity of the dirt that blew away (B )= 60452 g = 60.452 kg
Remaining quantity of the black dirt is


Thus, the amount of black dirt the man has when he reaches home = 200.048 kg.