Answer
given,
thickness of the oil film = 234 n m
refractive index of oil = n = 1.65
Visible light (in air) has wavelengths between 430 nm (blue) and 770 nm (red)
λ = ?
condition of constructive interference
2 n t + λ/2 = k λ
now,
at k = 1
not between the visible range
at k =2
above wavelength is in the visible range.
Answer:
2.10 N
Explanation:
Draw a free body diagram of the toy. There are four forces:
Weight force mg pulling down,
Normal force N pushing up,
Friction force F pushing left,
Applied force 4.63 N pulling at an angle of 63.0°.
Sum of the forces in the x direction:
∑F = ma
4.63 N cos 63.0° − F = 0
F = 2.10 N
Answer:
The car exerts a force on the rock, and the rock exerts a force on the car. The two forces are equal in magnitude.
Explanation:
It is given that,
Mass of the car, M = 1500 kg
Mass of the rock, m = 0.1 kg
It is mentioned that a car traveling along a road is hit by a rock that creates a small crack in the car’s windshield. We need to find the correct option that describes the interaction between the windshield and the rock. We know that when one object hits another object, the force applied by object 1 on object 2 have equal and opposite reaction as per the Newton's third law of motion.
So, the car exerts a force on the rock, and the rock exerts a force on the car. The two forces are equal in magnitude. Hence, the correct option is (c).
Answer:
B) both the amplitude of the motion and the weight of the ball
Explanation:
Time period of a pendulum is given by
where,
L = Length of pendulum
g = Acceleration due to gravity
The system here is similar to a simple pendulum
It can be seen that the time period depends on L and g.
Amplitude and weight are the factors that do not determine the time period.
Hence, the answer is B) both the amplitude of the motion and the weight of the ball
D, spinal cord.
Please note that I am not 100% sure... Just taking an educated guess.