When an ice cube sits out on a warm day and melts where does the heat go?
2 answers:
Answer:
When an ice cube sits out on a warm day and melts the heat goes into the ice
Explanation:
When an ice cube sits out on a warm day and melts where does the heat go?
Firstly, temperature is the degree of hotness or coldness of a body, while heat is the transfer of internal energy due to temperature difference.
When ice melts there is no temperature change. The heat needed to change it from its solid state to its liquid state any noticeable change in temperature is called Heat of fusion Q measured in joules.
Q=m
So the heat goes directly to the ice to change its state from solid to liquid without any change in temperature. Only to break its intermolecular force of attraction.
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Answer:
d = 10.2 m
Explanation:
When the car travels up the inclined plane, its kinetic energy will be used to do the work in climbing up. So according to the law of conservation of energy, we can write that:
where,
m = mass of car
v = speed of car at the start of plane = (36 km/h)(1000 m/1 km)(1 h/3600 s)
v = 10 m/s
F = force on the car in direction of inclination = W Sin θ
W = weight of car = mg
θ = Angle of inclinition = 30°
d = distance covered up the ramp = ?
Therefore,
<u>d = 10.2 m</u>