Andrew kicks a ball along a straight path. The ball rolls straight forward for 13.2 meters. Then Andrew kicks the ball straight
1 answer:
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Answer:
a) Red: 1.34
Violet: 1.40
b) Red:
Violet:
Explanation:
a) We should use Snell's law to find the index of refraction:
with n1 the index of refraction of air, n2 the index of refraction of the glass, θi the angle of the incident ray respects the normal an θt the angle between the refracted ray an the normal. It's common to approximate n1=1
solving n2 for red light:
solving n2 for violet light:
b) Index of refraction on a medium is defined as the ratio between the velocity of electromagnetic waves on vacuum (velocity of light c) and the velocity in medium (v):
solving v for red:
solving v for violet
Answer: Option (b) is the correct answer.
Explanation:
Kinetic energy is the energy of an object or particle when it is in motion.
Mathematically, Kinetic energy =
It is given that toy truck has mass = 0.75 kg, and velocity = 4 m/s.
Calculate the kinetic energy as follows.
Kinetic energy =
=
=
=
=
or, Kinetic energy = 6 joules
Thus, we can conclude that kinetic energy of toy truck is 6 J.