Heat required to change the phase of ice is given by
Q = m* L
here
m = mass of ice
L = latent heat of fusion
now we have
m = 45 kg
L = 334 KJ/kg
now by using above formula
In KJ we can convert this as
so the correct answer is D option
Right Hand Rule 1 requires you to put the thumb of your right hand in the direction of current and your curled fingers will indi
2 answers:
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Answer:
a) , b)
Explanation:
a) The heat transfered to the egg is computed by the First Law of Thermodynamics:
b) The amount of entropy generation is determined by the Second Law of Thermodynamics:
The initial velocity of the skier is 4.5 m/s
Explanation:
There is only one force acting on the skier in the horizontal direction, and it is the force of friction, whose magnitude is
where
is the coefficient of kinetic friction
m is the mass of the skier
is the acceleration of gravity
The negative sign is due to the fact that the direction of the force of friction is opposite to the direction of motion of the skier.
According to Newton's second law, the net force acting on the skier is equal to the product between his mass and his acceleration, so we can write:
So, the acceleration of the skier is
Now we can apply the following suvat equation to find the initial velocity of the skier:
where
v = 0 is the final velocity (he comes to a stop)
u is the initial velocity
s = 21 m is the displacement
a is the acceleration
Substituting the equation for the acceleration and solving for u, we find
Learn more about accelerated motion here:
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