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
avanturin [10]
3 years ago
9

А A pool of water of refractive index

Physics
1 answer:
babymother [125]3 years ago
3 0

Answer:

Apparent depth = 45 cm

Explanation:

The refractive index of water in a pool, n = 4/3

Real depth, d = 60 cm

We need to find its apparent  depth when viewed vertically through  air.​ The ratio of real depth to the apparent depth is equal to the refractive index of the material. Let the apparent depth is d'. So,

n=\dfrac{d}{d'}\\\\d'=\dfrac{d}{n}\\\\d'=\dfrac{60}{\dfrac{4}{3}}\\\\d'=45\ cm

So, the apparent depth is 45 cm.

You might be interested in
Which of the the following distance vs time graphs represents an object the is moving at constant non zero velocity
mario62 [17]
A graph with a horizontal line
8 0
3 years ago
The graph above shows the position x as a function of time for the center of mass of a system of particles of total mass 6. 0 kg
kumpel [21]

The resulting change in momentum of the system will be +18.6 Ns. The momentum is conserved.

<h3>What is the law of conservation of momentum?</h3>

According to the law of conservation of momentum, the momentum of the body before the collision is always equal to the momentum of the body after the collision.

The given data in the problem is;

m is the mass =6.0 kg

t is the time interval=2 second

From Newton's second law;

\rm \triangle P =m \triangle V \\\\ \triangle P= m(\frac{\triangle x}{\triangle t} )\\\\

From the graph;

\rm \triangle t = 2sec\\\\ \triangle x = (12-8) m

The change in the momentum is;

\rm \triangle P = m\tr(\frac{v-u}{t}) \\\\ \triangle P =9.3 \times \frac{12-8}{2} \\\\ \triangle P= +18.6 \  N.s

Hence, the resulting change in momentum of the system will be +18.6 Ns.

To learn more about the law of conservation of momentum, refer;

brainly.com/question/1113396

#SPJ1

6 0
2 years ago
suppose a vacuum cleaner use 120 j of electrical energy. If 45 j are used to pull air into the vacuum cleaner, how efficient is
Mice21 [21]
It depends on how much time 45 j will go, so if you told me that it went through 45 j per minute it will go through for 2 minutes so not efficient unless it went through 45 j per hour then it is efficient. 
8 0
3 years ago
Drag the tiles to the correct boxes to complete the pairs.
Dimas [21]
Brown dwarf is the first box
White dwarf is the second box
Black dwarf is the third box
Red giant is the fourth box
And
Black hole is the last box
5 0
3 years ago
What is the average total energy density in electromagnetic radiation that has an intensity of 475 W/m^2?
Andreas93 [3]

Answer:

1.6 x 10⁻⁶ J/m³

Explanation:

I = Intensity of electromagnetic radiation = 475 Wm⁻²

U = average total energy density of electromagnetic radiation

c = speed of electromagnetic radiation = 3 x 10⁸ m/s

Intensity of electromagnetic radiation is given as

I = Uc

Inserting the values

475 = U (3\times 10^{8})

U = 1.6 x 10⁻⁶ J/m³

5 0
3 years ago
Other questions:
  • Your life expectancy can be related to the overall well-being of your body your mind and your relationships with other people tr
    10·1 answer
  • What does the word invulnerable mean​
    6·1 answer
  • The number of waves passing a fixed point per second is known as ______________.
    7·1 answer
  • What is the area of 12 1/2 and 17 1/5
    9·1 answer
  • How far will a bird have traveled in 13 seconds if it maintains a speed of 31 m/s
    9·1 answer
  • An astronaut has a weight of 2000 kg elephant
    7·1 answer
  • A river 800m wide flows at the rate of 5km/h . A swimmer who can swim at 10km/h in still water wants to cross the river straight
    5·1 answer
  • Ella makes this table to organize her notes on whether atoms gain or lose energy during the changes of state.
    11·2 answers
  • List the two things that affect gravitational force.
    7·2 answers
  • We observe objects that move and notice changes that happen quickly. Which of the following would be most difficult to observe d
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!