What happens to the temperature of a substance while it is changing state?
2 answers:
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Answer:
r = 29.53 degrees
Explanation:
Given that,
Angle of incidence,
We need to find the angle at which it will travel in the water. The refractive index of water is 1.33 and refractive index of air is 1. Using Snell's law as :
r is the angle of refraction
So, the ray will travel at an angle of 29.53 degrees in the water.
Answer:
6.5 m
Explanation:
First of all, we need to compute the acceleration of the skier. We know that there is only force acting on the skier: the force of friction, which is in the opposite direction to the motion of the skier. Using 2nd Newton Law:
where is the force of friction, with
is the coefficient of kinetic friction
m is the mass of the skier
is the acceleration due to gravity
Re-arranging the equation, we find:
So now we can use the following SUVAT equation to calcualte the total displacement of the skier before stopping:
where
v = 0 is the final velocity
u = 5.30 m/s is the initial velocity
a = -2.16 m/s^2 is the acceleration
d = ? is the displacement
Solving the formula for d, we find: