The question is incomplete. You dis not provide values for A and B. Here is the complete question
Light in the air is incident at an angle to a surface of (12.0 + A) degrees on a piece of glass with an index of refraction of (1.10 + (B/100)). What is the angle between the surface and the light ray once in the glass? Give your answer in degrees and rounded to three significant figures.
A = 12
B = 18
Answer:
18.5⁰
Explanation:
Angle of incidence i = 12.0 + A
A = 12
= 12.0 + 12
= 14
Refractive index u = 1.10 + B/100
= 1.10 + 18/100
= 1.10 + 0.18
= 1.28
We then find the angle of refraction index u
u = sine i / sin r
u = sine24/sinr
1.28 = sine 24 / sine r
1.28Sine r = sin24
1.28 sine r = 0.4067
Sine r = 0.4067/1.28
r = sine^-1(0.317)
r = 18.481
= 18.5⁰
Part 1)
here we can say that since block slides down by 1 m in 4 s
so here we know that
d = 1 m
t = 4 s
so we can use kinematics equation to find the acceleration
Part 2
by force equation on mass m2 we can say
for another block of mass m1
solving above equations we will have
Part 3
now for mass m2 we have
Answer:
Desert
Explanation:
The desert receives the least amount of rainfall yearly.
A desert can be described a barren area of land where little amount of rainfall occurs and, because of this, living conditions are not favourable for plants and animal life. Because there is no vegetation in a desert, the bare surface of the ground are subjected to denudation.
Answer:
thermometer is based on the principle of thermal expansion.
Astronomers learn about the internal structure and evolution of stars by using spectroscopy and observing their luminosity.
New stars form in nebulae, interstellar gases and dust clouds leftover from supernovas.
Supernovas are the results of stars running out of its nuclear fuels.
The lifespan of a massive star is shorter than a star like the Sun because massive stars have very high pressures and temperatures at their cores and therefore burn their nuclear fuels faster. Stars grow larger as they age.