1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
fredd [130]
3 years ago
14

HELP ASAP. WILL GIVE BRAINLIEST.

Physics
1 answer:
chubhunter [2.5K]3 years ago
3 0

The fastest thing in the whole universe is the speed of light in a vacuum. The speed is around 2.99 * 10^{8} . It is fastest in vacuum as vacuum does not contain any dust particles and is a hollow space so light travels faster. It also has a refractive index of 1 so it travels faster.

After vacuum light travels faster in air. Air has a refractive index of 1.0003.

After air, it travels faster in water. The speed is about 3/4 of its speed in a vacuum, or 225,000,000 meters per second. Speed slows in water because photons interact with atoms, which repeatedly absorb and re-emit them to the same direction. The refractive index of water is 1.33.

You might be interested in
You need to design a photodetector that can respond to the entire range of visible light. True or False
Rasek [7]

Answer: True

Explanation:

A photo detector that can respond to the entire rang of visible light can be design, it is true.

Photo detector is a device in an optical receiver which receives optical signals and convert it to electric signal. It is the key device position in front of the optical receiver.

7 0
3 years ago
The speed that a tsunami can travel is modeled by the equation , where s is the speed in kilometers per hour and d is the averag
CaHeK987 [17]

The speed of tsunami is a.0.32 km. 

Steps involved  :

The equation s = 356d models the maximum speed that a tsunami can move at. It reads as follows: s = 200 km/h d =?

Let's now change s to s in the equation to determine d: s = 356√d 200 = 356√d √d = 200 ÷ 356 √d = 0.562 Let's square the equation now by squaring both sides: (√d)² = (0.562) ² d = (0.562)² = 0.316 ≈ 0.32

As a result, 0.32 km is roughly the depth (d) of water for a tsunami moving at 200 km/h.

To learn more about tsunami refer : brainly.com/question/11687903

#SPJ4

6 0
2 years ago
Imagine that Earth stops orbiting the Sun but continues to rotate in place about its own axis at its current rate. In this case,
otez555 [7]

Answer:

The length of the solar day will get shorter.

Explanation:

  • The blue planet Earth not only rotates around it's own axis but also rotates around the Sun and everyday it moves a little bit around the axis.
  • Since the speed of the Earth's rotation on it's own axis and around the Sun is constant we don't feel the effects of the rotation.We can only feel the motion if the earth changes it's rotation speed.
  • If by any means or chance the Earth stopped spinning (stopped rotation) then the atmosphere surrounding the Earth would be in motion and all the Earth's land would be scoured clean.

7 0
3 years ago
a net force of 219 N is exterted on a rock. the rock has an acceleration of 3m/s^2 due to this force. what is the mass of the ro
Sonbull [250]

Answer:

<h2>73 kg</h2>

Explanation:

The mass of the object can be found by using the formula

m =  \frac{f}{a}  \\

f is the force

a is the acceleration

From the question we have

m =  \frac{219}{3}  \\

We have the final answer as

<h3>73 kg</h3>

Hope this helps you

6 0
3 years ago
What is the potential difference across a parallel-plate capacitor whose plates are separated by a distance of 4.0 mm where each
suter [353]

The potential difference across the parallel plate capacitor is 2.26 millivolts

<h3>Capacitance of a parallel plate capacitor</h3>

The capacitance of the parallel plate capacitor is given by C = ε₀A/d where

  • ε₀ = permittivity of free space = 8.854 × 10⁻¹² F/m,
  • A = area of plates and
  • d = distance between plates = 4.0 mm = 4.0 × 10⁻³ m.

<h3>Charge on plates</h3>

Also, the surface charge on the capacitor Q = σA where

  • σ = charge density = 5.0 pC/m² = 5.0 × 10⁻¹² C/m² and
  • a = area of plates.

<h3>The potential difference across the parallel plate capacitor</h3>

The potential difference across the parallel plate capacitor is V = Q/C

= σA ÷ ε₀A/d

= σd/ε₀

Substituting the values of the variables into the equation, we have

V = σd/ε₀

V = 5.0 × 10⁻¹² C/m² × 4.0 × 10⁻³ m/8.854 × 10⁻¹² F/m

V = 20.0 C/m × 10⁻³/8.854 F/m

V = 2.26 × 10⁻³ Volts

V = 2.26 millivolts

So, the potential difference across the parallel plate capacitor is 2.26 millivolts

Learn more about potential difference across parallel plate capacitor here:

brainly.com/question/12993474

7 0
3 years ago
Other questions:
  • A filamentary conductor is formed into an equilateral triangle with sides of length carrying current i . find the magnetic field
    14·1 answer
  • A 10 kg mass rests on a table. What acceleration will be generated when a force of 20 N is applied and encounters a frictional f
    12·1 answer
  • Why can scientists ignore the gravitational force when studying the physics of an atom?
    12·1 answer
  • The earth has a magnetic field much like a bar magnet. Explain this statement. what does a bar magnet look like? what does its f
    11·2 answers
  • Four engineers propose designs for door locks that are triggered by a sample of
    13·1 answer
  • Which of the following would not make a good insulator
    13·1 answer
  • How do the charges compare when two objects are charged through friction
    5·1 answer
  • What part of a plant cell traps sunlight?_____________________
    14·2 answers
  • Which statement is true about the circuit diagram below?
    5·1 answer
  • Light travels in a straight line at a constant speed of 3.0 x 10 8 m/s for 4.1
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!