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
Basile [38]
3 years ago
7

A ray in oil (n = 1.52) reaches a boundary with water (n = 1.33) at 55.9 deg. Does it reflect internally or refract into the air

?
Physics
1 answer:
natta225 [31]3 years ago
5 0

Answer:

Ray reflects internally

Explanation:

Given:

Ray in oil (n1) = 1.52

Ray in water (n2) = 1.33

θ = 55.9°

Computation:

Step 1 . Find critical angel(θc)

Sinθc/Sin90° = Ray in water / Ray in oil

Sinθc/1 = 1.33/1.52

θc = 61°

Since, θ = 55.9° is smaller than θc = 61°

So, Ray reflects internally.

You might be interested in
A mass m attached to a horizontal massless spring with spring constant k, is set into simple harmonic motion. its maximum displa
Lesechka [4]
At the point of maximum displacement (a), the elastic potential energy of the spring is maximum:
U_i= \frac{1}{2} ka^2
while the kinetic energy is zero, because at the maximum displacement the mass is stationary, so its velocity is zero:
K_i =0
And the total energy of the system is
E_i = U_i+K= \frac{1}{2}ka^2

Viceversa, when the mass reaches the equilibrium position, the elastic potential energy is zero because the displacement x is zero:
U_f = 0
while the mass is moving at speed v, and therefore the kinetic energy is
K_f =  \frac{1}{2} mv^2
And the total energy is
E_f = U_f + K_f =  \frac{1}{2} mv^2

For the law of conservation of energy, the total energy must be conserved, therefore E_i = E_f. So we  can write
\frac{1}{2} ka^2 =  \frac{1}{2}mv^2
that we can solve to find an expression for v:
v= \sqrt{ \frac{ka^2}{m} }
6 0
3 years ago
Imagine two fixed charges on the x axis. Charge one is +q and is located to the left of charge two which is equal to -4q. Where
givi [52]

Answer: B)To the left of the charges.

Explanation: between the charges the electric field will not cancel but will be added since electric field lines from both charges point in the same direction. To the right of the charge the -4q will take over as it’s strength overcomes the strength of the +q charge. At this point the magnitude of +q will never reach a magnitude strong enough to cancel the -4q. To the left, it is further away from -4q and is closer to +q and electric field lines point in different direction

7 0
2 years ago
An unstrained horizontal spring has a length of 0.31 m and a spring constant of 220 N/m. Two small charged objects are attached
Kruka [31]
The solution you should use is Hooke's law: F=-kx

It should have the same signs because they repel due to the stretch of the spring. 

a. Since there is a constant energy within the spring, then Hooke's law will determine the possible algebraic signs. The solution should be 
<span>F = kx 
270 N/m x 0.38 m = 102.6 N 
</span>
b. Then use Coulomb's law; F=kq1q2/r^2 to find the charges produced in the force. 



8 0
3 years ago
Why is Pluto no longer a planet?
Step2247 [10]
The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf planet because it did not meet the three criteria the IAU uses to define a full-sized planet. Essentially Pluto meets all the criteria except one—it “has not cleared its neighboring region of other objects.
5 0
2 years ago
Read 2 more answers
Write a short note on escape velocity.​
andrezito [222]

Answer:

physics, escape velocity is the minimum speed needed for an object to escape from the gravitational influence of a massive body. The escape velocity from Earth is about 11.186 km/s (6.951 mi/s; 40,270 km/h; 25,020 mph)[1] at the surface. ... [2] Speeds higher than escape velocity have a positive speed at infinity.

6 0
3 years ago
Read 2 more answers
Other questions:
  • On your wedding day, you leave for the church 25 minutes before the ceremony is to begin. The church is 8 miles away. On the way
    8·1 answer
  • What kind of relationship is it when a tree needs fungus to be present to grow normally
    7·1 answer
  • Select Light for the type of wave, adjust the wavelength so that the light is red, and increase the amplitude of the light to th
    10·1 answer
  • A gas expands and does PV work on its surroundings equal to 319 J. At the same time, it absorbs 136 J of heat from the surroundi
    7·1 answer
  • Help pleaseee is this correct?​
    14·1 answer
  • When You lift a load, the resistance force is ?<br><br> A. magnetism <br> b. gravity
    6·2 answers
  • A force of 20 N is executed to raise a rock weighing 30 N. What is the actual mechanical advantage?
    11·2 answers
  • A 500 N weight sits on the small piston of a hydraulic machine. The small piston has area 2.0 cm2. If the large piston has area
    9·1 answer
  • Is kirchoff's law applicable for ac circuits?
    9·1 answer
  • Please help will mark Brainliest the
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!