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Veronika [31]
3 years ago
7

If a beam of light enters one medium from another medium, what quantity does not change?

Physics
1 answer:
wlad13 [49]3 years ago
4 0

The answer is D- Frequency

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150 ml of water is heated with a burning marshmallow From 20 c to 93.5 C
kap26 [50]

93.5 if it’s wrong sorry sis I need my homework done too
7 0
3 years ago
How does being on the moon effect gravitational field strength
SVETLANKA909090 [29]

Your being on the moon has no effect on the moon's
gravitational field strength, or on the Earth's for that
matter.

However, YOU notice a change on YOU when YOU move
from one to the other, because of the effect of the gravitational
field strength on you and your internal organs.

If you could stand on the moon, you would experience an incredible
sense of lightness, since the forces of attraction between the moon
and anything else are only 16% as great as the same forces are on
Earth.

5 0
3 years ago
A horizontal line on a velocity/time graph shows ____ acceleration.
Novay_Z [31]

Answer:

Zero (0)

Explanation:

A horizontal line will be no movement of negative of positive acceleration

6 0
3 years ago
Read 2 more answers
A horizontal air diffuser operates with inlet velocity and specific enthalpy of 250 m/s and 270.11 kj/kg, repectively, and exit
Ivahew [28]

Answer: c) 90 m/s

Explanation:

Given

Invest velocity, v1 = 250 m/s

Inlet specific enthalpy, h1 = 270.11 kJ/kg = 270110 J/kg

Outlet specific enthalpy, h2 = 297.31 kJ/kg = 297310 J/kg

Outlet velocity, v2 = ?

0 = Q(cv) - W(cv) + m[(h1 - h2) + 1/2(v1² - v2²) + g(z1 - z2)]

0 = Q(cv) + m[(h1 - h2) + 1/2(v1² - v2²)]

0 = [(h1 - h2) + 1/2(v1² - v2²)]

Substituting the values of the above, we get

0 = [(270110 - 297310) + 1/2 ( 250² - v²)

0 = [-27200 + 1/2 (62500 - v²)]

27200 = 1/2 (62500 - v²)

54400 = 62500 - v²

v² = 62500 - 54400

v² = 8100

v = √8100

v = 90 m/s

4 0
3 years ago
1. In an atom, an electron and a proton are separated by a distance of 1 x 10-8m. a) Find the force on the electron. b) Assuming
aleksandrvk [35]

Answer:

(a) 2.3 x 10^-12 N

(b) 1.6 x 10^5 m/s

Explanation:

q1 = 1.6 x 10^-19 C

q2 = 1.6 x 10^-19 C

r = 1 x 10^-8 m

(a) the electrostatic force is given by

F = K q1 x q2 / r^2

F = ( 9 x 10^9 x 1.6 x 10^-19 x 1.6 x 10^-19) / (1 x 10-^-8)^2

F = 2.3 x 10^-12 N

The force is attractive in nature because the nature of charge on electron and proton s opposite to each other.

(b) The electrostatic force is balanced by the centripetal force actig on the electron.

F = mv^2 / r

where, r be the radius of orbit and v be the velocity of electron in the orbit.

2.3 x 10^-12 = (9.1 x 10^-31 x v^2) / (1 x 10^-8)

v = 1.6 x 10^5 m/s

6 0
3 years ago
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