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Dmitriy789 [7]
1 year ago
12

The law of reflection states that the angle of incidence and the angle of reflection will ______.Select one:a.never be equalb. a

lways add up to 90 degreesc.always add up to 180 degreesd.always be equal
Physics
1 answer:
Dmitry [639]1 year ago
4 0

The law of reflection states that the angle of incidence and the angle of reflection will always be equal.

When a ray of light reflects off a surface, the angle of reflection is equal to the angle of incidence.

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. There are fewer organisms at the highest trophic levels, because
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Answer:

Because there is less energy at higher trophic levels

Explanation:

  • In a food chain that shows the feeding levels of organisms in an ecosystem, energy decreases as you move from the lowest trophic level to the highest trophic level.
  • The lowest trophic level consists of producers which have the highest energy as they trap energy directly from the sunlight.
  • The energy is lost from one trophic level to the next up to the highest trophic level which has the lowest energy.
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A 15N block is sliding at constant speed across the frictionless floor of an ice rink.
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On a winter day with a temperature of -10°C, 500g of snow (water ice) is brought inside where the temperature is 18 °C. The snow
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Answer:

Explanation:

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Heat required to raise the temperature of ice by 10 degree

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= mass of ice x latent heat

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167000 J

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A magnet contains a ____ numbers of magnetic domains
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A bungee jumper with mass 65.0 kg jumps from a high bridge. After reaching his lowest point, he oscillates up and down, hitting
ololo11 [35]

Explanation:

It is given that,

Mass of a bungee jumper is 65 kg

The time period of the oscillation is 38 s, hitting a low point eight more times.It means its time period is

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After many oscillations, he finally comes to rest 25.0 m below the level of the bridge.

For an oscillating object, the time period is given by :

T=2\pi \sqrt{\dfrac{m}{k}}

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So,

k=\dfrac{4\pi ^2m}{T^2}\\\\k=\dfrac{4\pi ^2\times 65}{(4.75)^2}\\\\k=113.43\ N/m

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mg=kx

x = the extension in the cord

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5 0
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