Different _______ of light through two separate mediums causes the bending of wave fronts associated with light rays.

Answers

Answer 1

Answer: The different reflections of light through two separate mediums causes the bending of wave fronts associated with light rays. The reflection and refraction is caused by the medium associated with its light rays.

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A stone falls from a ledge and takes 8 seconds to hit the ground. The stone has an original velocity of 0 m/s. How tall is the ledge? A. 313.6 meters B. 78.4 meters C. 39.2 meters D. 1,254.4 meters
Density is given in ____. a. Pa/cm3 c. g/s2 b. N/m2 d. g/cm3
Terminal velocity and Inicial velocity they are related???
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Can someone help with number 4 please

Answers

The way I look at these things is like this:

-- The runner covered 12 meters in 4 seconds.
Average speed = 3 meters per second.

-- Speed at the beginning = zero.
In order to make the average 3, Speed at the end = 6 meters per second.

-- Speed increased from zero to 6 meters per second in 4 seconds.
It must have increased 1.5 meters per second each second.

That's choice-#2.

Here we have -
Acceleration (a) = ?
Initial velocity (u) = 0 m/s (runner starts from rest)
Distance (s) = 12 m
Time (t) = 4 seconds

So, using the second equation of motion, we have-

$s = ut + (1)/(2)at^(2)$

$12 = 0*4 + (1)/(2)*a*4 ^(2)$

$12 = 0+8a$

$(12)/(8) = a$

$1.5m/ s^(2)$

So, option (2) is correct.

Water can dissolve many substances because it has an overall negative charge, allowing it to attack positively-charged ions.True or False?

Answers

true
1: Cation-positive charge2: Isotope-diff # of neutrons3: Element-it can be found on the periodic table(pure)4: Anion-negative charge5: Compound-even ration6: Ion-element with a charge(cations and anions are a more specific way of describing ions)Hope this helps!

A small laser emits light at a power of 5.00 mW. The laser beam is focussed until its diameter matches the 1266 nm diameter of a sphere placed in its path. The sphere is perfectly absorbing and has a density of 5.00 x10 3 kg/m 3.a. Calculate the average energy per unit time per unit area (S). b. Find the maximum values of E and B. c. Calculate the radiation pressure on the sphere and the force exerted on the sphere. d. Find the acceleration of the sphere.

Answers

a). The half of the sphere facing the beam has surface area of

   2 (pi) (R²)

   = (2 pi) (633 x 10⁻⁹ m)²

   = (2 pi) (4.01 x 10⁻¹³) m²

   = 2.52 x 10⁻¹² m²

Average power = (5 x 10⁻³ W) / (2.52 x 10⁻¹² m²)

   = 1.984 GW / m² .

b).
c).
d). I don't remember how to do these parts of the question.
However, I do sincerely believe that the solution of part-'a' was
a fair return for the penurious and parsimonious award of 5-points.

Which particle builds a static electric charge when it is transferred from one object to another? A.proton

B.atom

C.electron

D.molecule

Answers

c, because of its electrical charge

What do we mean by the main-sequence turnoff point of a star cluster, and what does it tell us? It is the spectral type of the hottest main sequence star in a star cluster, and it tells us the cluster's age. It is the point in a star cluster beyond which main sequence stars are not found, and it tells us the cluster's distance. It is the faintest and coldest main sequence star in a cluster, and it tells us the cluster's age. It is the mass of the most massive star in the star cluster, and it tells us the cluster's size.

Answers

Answer:

Explanation: The turnoff point for a star refers to the point on the Hertzsprung–Russell diagram where it leaves the main sequence after its main fuel is exhausted-the main sequence turnoff. HR diagrams for two open clusters, M67 and NGC 188, showing the main sequence turn-off at different ages.

If the current in the circuit above is 10 amps and the resistance is 3 ohms, what is the voltage?

Answers

It's really difficult to make out the circuit above. Quite frankly, your
question leaves me to wonder how far 'above' it may be.
The best I can do will be to try and fabricate an answer based on the
information given in the text of the question, augmented only by my own
training, chutzpah, and life experiences.

If the circuit ... wherever it is ... consists entirely of the single 3-ohm
resistance and no other components, and the current through the
resistance is 10 Amperes, then

Voltage = (Current) x (resistance) = 30 volts .

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Light travels 300,000,000 m/s, and one year has approximately 32,000,000 seconds. A light year is the distance light travels in one year. State this distance in centimeters.