9) What will happen to the period of a pendulum if we change the rope of a pendulum with another which is four times with the in
1 answer:
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Answer:
E. greater than the angle of incidence.
Explanation:
Snell's law states that:
(1)
where
are the refractive index of the first and second medium
are the angle of incidence and refraction, respectively
For light moving from water to air, we have:
(index of refraction of water)
(index of refraction of air)
Substituting into (1) and re-arranging the equation, we get
which means that
so, the correct answer is
E. greater than the angle of incidence.
Answer:
240 ft
Explanation:
t = Time taken
u = Initial velocity = 96 ft/s
v = Final velocity
s = Displacement
a = Acceleration = 12 m/s² on Mars 32 ft/s² on Earth negative due to upward direction
Mars
Earth
Differentiating the first equation with respect to time we get
Equating with zero
Differentiating the second equation with respect to time we get
Equating with zero
Applying the time taken to the above equations, we get
Difference in height = 384-144 = 240 ft
The stone will travel 240 ft higher on Mars