How much heat is required to convert 500g of liquid water at 28°C into steam at 150 °C? Take the specific heat capacity of water
1 answer:
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Answer: a) 31.07 * 10^6 N/C ; b) 11.68 * 10^6 N/C
Explanation: in order to solve this problem we have to use the Coulomb force which is given by:
F=k*q1*q2/r^2
( see attach for details)
Explanation:
(a) It is given that two-third of weight is over the drive wheels. So, mathematically, w = .
Hence, maximum force is expressed as follows.
Hence, the maximum acceleration is calculated as follows.
=
= 6.53
Hence, the maximum acceleration of the Porsche on a concrete surface where μs = 1 is 6.53 .
(b) Since, 30% of the power is lost in the drive train. So, the new power is 70% of .
That is, new power =
Now, the expression for power in terms of force and velocity is as follows.
P =
Therefore, speed of the Porsche at maximum power output is as follows.
=
= 11.568 m/s
= 11.57 m/s
Therefore, speed of the Porsche at maximum power output is 11.57 m/s.
(c) The time taken will be calculated as follows.
time =
=
= 1.77 s
Therefore, the Porsche takes 1.77 sec until it reaches the maximum power output.
The distance covered by the object between t =4 s and t = 6 s is 4 m
Explanation:
In a velocity-time graph, the distance covered by the object represented can be found by calculating the area under the curve.
Therefore, the distance covered by the object between t = 4 s and t = 6 s is the area under the curve between 4 s and 6 s.
We see that we have to calculate the area of a triangle, with:
Base:
And height:
Therefore, the area is
So, the distance covered by the object is 4 m.
Learn more about distance:
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