Light traveling through air at 3.00 · 10^8 m/s reaches an unknown medium and slows down to 2.00 · 10^8 m/s. What is the index of refraction of that medium? n =
Answers
v 2 = 2.00 · 10^8 m/s
The index of refraction:
n = v 1 / v 2 = 3.00 · 10^8 m/s : 2.00 · 10^8 m/s = 1.5
Answer:
The index of refraction of that medium is 1.5
Answer
The index of refraction of medium is 1.5 .
Explanation:
Equation for index of refraction is given by .
Where n is index of refraction in medium , v is speed of light in the medium and c is the speed of light in air .
As given
Light traveling through air at m/s reaches an unknown medium and slows down to
m/s.
Putting the values in the formula
Solving the above
n = 1.5
Therefore the index of refraction of medium is 1.5 .
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Which electrical protective device is designed to detect a difference in current between circuit wires and interrupt the circuit and stop the flow of electricity? (1 point)a. GFCI b. Circuit breaker c. Fuse d. Insulation
Which of the following is true about the action and reaction force referred in Newton's Third Law of Motion? a. I. They have equal magnitude but directed in opposite direction. b. II. They act on the same object simultaneously. c. III. They act on different bodies. d. IV. They act simultaneously.
How do the units of work and power compare? a) The unit for work is a watt. The unit for power is a joule, which is a watt-second. b)The unit for work is a watt. The unit for power is a joule, which is a watt per second. c)The unit for work is a joule. The unit for power is a watt, which is a joule-second. d)The unit for work is a joule. The unit for power is a watt, which is a joule per second.
How does polarizing filter reduce glare?
condensation
convection
collaboration
Answers
Answer is C. Convection
Answers
give the answer in watts to three significant figures
Answers
Work done = mgh
Mass, m = 33kg ( Am presuming it is 33 kg).
h = 85 m.
Work done = 33 * 9.81* 85 = 27517.05 J.
Time taken.
Since object was dropped from height, it fell under gravity.
Using H = ut + (1/2) * gt^2. u = 0.
H = 1/2 gt^2.
t = (2H/g) ^ (1/2)
t = (2*85/9.81) ^ 0.5 = 4.1628 s.
Power = 27517.05 / 4.1628 = 6610.23 Watts.
= 6610 W to 3 S. f.
Particles of matter are packed more tightly in the ground than in the air.
Air doesn’t contain any particles of matter to transmit sound waves.
The elevation of the ground is lower than the elevation of the air space.
Answers
Answer:
Particles of matter are packed more tightly in the ground than in the air.
Explanation:
As we know that velocity of sound in a given medium is given by formula
here we know that
E = elasticity of the medium
= density of the medium
now we know that if we increase the density of medium then particles of matter are packed more which will decrease the speed of wave.
while is particles are tightly packed then it will increase the elasticity of the medium
So here if all particles are tightly bounded with each other then sound waves will move faster through the medium
Answers
power
force
energy
inertia
Answers
The rate of doing work is called power.
Hence, the correct option is A.
Power is a measure of how quickly or how much work is done per unit of time.
It is the amount of energy transferred or converted per unit time. The unit of power is the watt (W), where 1 watt is equal to 1 joule of work done per second.
Therefore, The rate of doing work is called power.
Hence, the correct option is A.
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Final answer:
Power is the correct term in physics for the rate of doing work. It signifies the amount of work done or energy converted per unit of time. Other options provided like force, energy, and inertia have different meanings in physics.
Explanation:
The rate of doing work is called power. In physics, power is defined as the amount of work done or energy converted per unit of time. For example, when you lift a heavy box, you're doing work, and the faster you lift that box (maintaining the same force), the more power you're exerting.
Whereas force is a push or pull upon an object resulting from the object's interaction with another object, energy is the capacity for doing work, and inertia refers to an object's resistance to change in motion.
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