Therefore an answer in U.S. customary units, such as miles per hour would not be accepted as correct. A car traveling with const
2 answers:
Answer:
The speed of the car is 20.84 m/s.
Explanation:
Given that,
The distance covered by the car, d = 150 km
Time, t = 7200 s
We need to find the speed of the car. We know that the speed of an object is given by total distance divided by total time taken. Mathematically,
So, the speed of the car is 20.84 m/s.
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When an object gets heated by a temperature ΔT energy needed, E = mcΔT
Here energy is given E = 2050 J
Mass of object = 150 g
Change in temperature ΔT = 15 = 15 K
a) Heat capacity of an object equal to the ratio of the heat added to (or removed from) an object to the resulting temperature change.
So heat capacity = E/ΔT = 2050/15 = 136.67 J/K
b) We have E = mcΔT
c =
So object's specific heat = 911.11 J/kgK