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3 years ago

Which statement best explains the speed of light waves as they travel from gas to solid?

Physics

1 answer:

igomit [66]3 years ago

8 0

Answer:

Light waves slow down as they travel from gas to solid.

Explanation:

The speed of light is often quoted with reference to a vacuum. Light travels fastest in a vacuum and in a gas.

When light travels through other media such as solids or liquids, the speed of light is decreased due to absorption and scattering of photons by molecules as well as remissions.

Hence the speed of light decreases from gas to solid.

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Two wires A and B with circular cross sections are made of the same metal and have equal lengths, but the resistance of wire A i

AlexFokin [52]

The resistance of wire B will be D. 1/2R

<h3>What is resistance?</h3>

It should be noted that resistance simply means the measure of the opposition to the current flow that's in an electric circuit.

Based on the information given, the resistance will be calculated thus:

= 2L/4A

= 1/2pL/A

= R/2

Therefore, the resistance of wire B will be D. 1/2R

Learn more about resistance in:

brainly.com/question/24858512

#SPJ4

Two wires A and B with circular cross sections are made of the same metal and have equal lengths, but the resistance of wire A is three times greater than that of wire B. (ii) What is the ratio of the radius of A to that of B

(a) 4 R (b) 2 R (c) R (d) 1/2R (e) 1/4R

8 0

2 years ago

A rock is projected from the edge of the top of a building with an initial velocity of 12.2 m/s at an angle of 53° above the hor

Volgvan

Answer:

h=23.67 m : Building height

Explanation:

The rock describes a parabolic path.

The parabolic movement results from the composition of a uniform rectilinear motion (horizontal ) and a uniformly accelerated rectilinear motion of upward or downward motion (vertical ).

The equation of uniform rectilinear motion (horizontal ) for the x axis is :

x = xi + vx*t Equation (1)

Where:

x: horizontal position in meters (m)

xi: initial horizontal position in meters (m)

t : time (s)

vx: horizontal velocity in m/s

The equations of uniformly accelerated rectilinear motion of upward (vertical ) for the y axis are:

y= y₀+(v₀y)*t - (1/2)*g*t² Equation (2)

vfy= v₀y -gt Equation (3)

Where:

y: vertical position in meters (m)

y₀ : initial vertical position in meters (m)

t : time in seconds (s)

v₀y: initial vertical velocity in m/s

vfy: final vertical velocity in m/s

g: acceleration due to gravity in m/s²

Data

v₀ = 12.2 m/s , at an angle α=53° above the horizontal

x= 25 m , y=0

Calculation of the time it takes for the ball to hit the ground

We replace data in the equation (1)

x = xi + vx*t

x= 25 m ,xi=0 , vx= v₀*cosα = (12.2 m/s)*cos(53°) =7.34 m/s

25 = 0 + 7.34*t

t= 25 / 7.34

t= 3.406 s

Calculation of the Building height

v₀y = v₀*sinα = (12.2 m/s)*sin(53°) = 9.74 m/s

in t= 3.406 s, y=0

We replace data in the equation (2)

y= y₀ + (v₀y)*t - (1/2)*gt²

0= y₀ + (9.74)*(3.406 )- (1/2)*(9.8)(3.406 )²

0= y₀ + 33.17- -56.84

0= y₀ - 23.67

y₀ = 23.67 m =h: Building height

5 0

3 years ago

Is much work does a an elevator do to lift a 1500 kg elevator a height of 100 m?

Harrizon [31]

Work done is equal to the force times the distance over which that force acts (provided they are parallel vectors) In symbols we say:
$W= \int\limits^b_a { F^{.} } \, dr$
Since gravity acts downward and the elevator goes upward, the dot product is reduced to a simple multiplication problem. First we need the downward force of the elevator, which is the weight according to F=ma. F=1500kg*9.81m/s^2=14715N. Then W=14715N*100m=1471500J, or 1.4715MJ

3 0

4 years ago

A bus left Austin at 6:00 am and traveled to San Antonio. After the passengers got off the bus, it returned to Austin , arriving

horsena [70]

Answer:

The distance between cities

Explanation:

V= Distance/ Time

Time of round trip = 28.5 hours

Distance = X unknown

Vaverage = 2 x D / 28.5 hours = average speed

7 0

3 years ago

I need help with the question asap.

const2013 [10]

Answer:

whats the question lol

Explanation:

3 0

3 years ago

Read 2 more answers