Light travels faster in glass than it does in a vacuum. Please select the best answer from the choices provided T F

Answers

Answer 1

Answer: From among the choices provided, the better answer is ' F ',
the initial letter of the word ' False '.

Light does not travel faster in glass than it does in vacuum.
Light travels slower in glass than it does in vacuum.

As a matter of fact, light travels slower in anything than it does
in vacuum.

Answer 2

Answer: False.

Light travels faster in vacuum than in glass.

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The acceleration due to gravity on Jupiter is greater than that on Earth. On Jupiter, a person will weigh .

.Please explain to me how to find the momentum

Answers

Answer:

momentum = mass x velocity

Explanation:

So ultimately, find the mass of the object (be careful since this is not the same as weight. Weight is your gravitational pull to the earth. This means that your weight different amounts on different planets. But mass stays the same on all planets, it's what most people call their weight.) and then find the velocity (2 meters/second north, etc.)

Now you can apply this to your problem

What is the equation for calculating a machine's efficiency?I searched all over my textbook and couldn't find it, so I decided to post my question here.

Answers

Efficiency of a machine is defined as the ratio of work performed on it to work performed by it.

What is the fundamental meaning of efficiency?

Efficiency is the capacity to achieve something or get a desired outcome without wasting resources, time, money, energy, or effort. In a broader sense, it is the capacity to carry out tasks effectively and efficiently.
Effectiveness and efficiency are frequently misunderstood. Efficiency is often a quantifiablenotion that is based on the ratio of total useful input to total useful output.
When a machine uses the majority of the power provided to it for its load and just a small portion for waste, it is said to be highly efficient.

Efficiency = Output energy/ Input energy

The percentage value of efficiency of a machine is calculated as:

Efficiency = (Output energy/ Input energy) X 100%

Learn more about the machine efficiency with the help of the given link:

brainly.com/question/11752408

#SPJ2

Efficiency is usually defined as how much useful work output do you get for each unit of work input.

Efficiency = work output/work input

Work input = effort force * effort distance
Work output = load force * load distance

A 1451 kg car is traveling at 48.0 km/h. How much kinetic energy does it possess? K.E. =

Answers

   Kinetic energy = (1/2) (mass) (speed)²

BUT . . . in order to use this equation just the way it's written,
the speed has to be in meters per second. So we'll have to
make that conversion.

KE = (1/2) · (1,451 kg) · (48 km/hr)² · (1000 m/km)² · (1 hr/3,600 sec)²

   = (725.5) · (48 · 1000 · 1 / 3,600)² (kg) · (km·m·hr / hr·km·sec)²

   = (725.5) · ( 40/3 )² · ( kg·m² / sec²)

   = 128,978 joules (rounded)

A cat jumps 1m forward, then crawls 0.2m backwards. What is the displacement of the cat?

Answers

I think its 0.8m because 1+(-0.2)=0.8

Displacement refers to how far out of place an object is. So if the cat jumps a meter forward, than crawls back .2 meters, the cat is .8 meters out of place

What is the only force acting on an object orbiting Earth?A. air resistance
B. friction
C. inertia
D. gravity

Answers

The correct answer to the question is D). Gravity.

EXPLANATION:

Before coming into any conclusion, first we have to understand centripetal force.

Centripetal force is the force which is required to keep a body moving in a circular path. This force always acts along the radius and towards the centre.

As per the question, the object is moving around the earth. As it is moving in a orbit, it needs a centripetal force which will help the object stick to the orbit.

The centripetal force required is provided to the object by the gravitational force of earth .

Air resistance and friction play no role in imparting centripetal force to the object.

Hence, the correct option of this question is gravity, which is the only force that acts on an object orbiting earth.

im pretty sure its gravity

Matter is anything that

Answers

takes place in the space and it can be fluid or solid

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