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3 years ago

If an object absorbs all visible light, it will appear _____. A) red B) blue C) black D) white

Physics

1 answer:

aksik [14]3 years ago

7 0

Answer:

Black

If you shine a red light onto black paper the paper is still black and some of the light will look white. That is because black absorbs all the light and white reflects all light.

Hope this helps

Explanation:

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Which of the following may have happened if the inner planets had greater masses during the formation of the solar system? . . A

Svetach [21]

Right answer is option b that is the inner planet may havebeen larger and more gaseous.

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3 years ago

if a body of mass 2kg travels with 2 m/s and other body of mass 2kg travels with 1m/s then find v1 and v2 in given statement

KIM [24]

Answer:

Your answer is here,

Explanation:

v1 = 4 kg m/s

v2 = 2 kg m/s

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3 years ago

A 1.0-kilogram rubber ball traveling east at 4.0 meters per second hits a wall and bounces back toward the west at 2.0 meters pe

Mrrafil [7]

Answer:

8 J and 2 J

Explanation:

Given that,

Mass of the rubber ball, m = 1 kg

Initial speed of the rubber ball, u = 4 m/s (in east)

Final speed of the rubber ball, v = -2 m/s (in west)

We need to find the kinetic energy of the ball before it hits the wall, the kinetic energy of the ball after it bounces off the wall.

Initial kinetic energy,

$K_i=\dfrac{1}{2}mv^2\\\\K_i=\dfrac{1}{2}\times 1\times (4)^2\\\\K_i=8\ J$

Final kinetic energy,

$K_f=\dfrac{1}{2}mv^2\\\\K_f=\dfrac{1}{2}\times 1\times (2)^2\\\\K_f=2\ J$

So, the initial kinetic energy is 8 J and the final kinetic energy is 2 J.

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3 years ago

Compare the advantages and disadvantages of buying compact fluorescent bulbs rather than filament bulbs (6 marks)

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3 years ago

A blue train of mass 50 kg moves at 4 m/s toward a green train of 30 kg initially at rest. What is the initial momentum of the b

emmainna [20.7K]

<em>The correct option is</em> D. The initial momentum of the blue and green train combined during the collision is 200 kgm/s.

<h3>Initial momentum of the blue and green train</h3>

Apply the principle of conservation of linear momentum as follows;

Pi = m1v1 + m2v2

where;

m1 is mass of blue train
m2 is mass of green train
v1 is velocity of blue train
v2 is velocity green train
Pi is the initial momentum of the two trains

Pi = (50 x 4) + 30(0)

Pi = 200 kgm/s

Thus, the initial momentum of the blue and green train combined is 200 kgm/s.

Learn more about momentum here: brainly.com/question/7538238

#SPJ1

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2 years ago