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3 years ago

An unlit match is held near (not touching) a Bunsen flame. The match doesn't get hot enough to light because

1 answer:

6 0

The answer is option D)
this is because the heat radiated by the flame is mostly absorbed by the air surrounding it, so the air becomes hot and its density decreases (because of expansion), therefore it goes up and it is replaced by cooler air. since all of the hot air flies up, non goes side ways to heat up the match stick, hence it remains cool and does not light up.

option A) also sounds correct, but it isn't. this is because the flame IS hot enough to burn the match stick, it's just that the match stick is positioned the wrong way

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Which of the following statements is true regarding the nature of light?

Tanya [424]

I think the correct answer from the choices listed above is the last option. Straight line motion is both a wave and particle property of light. Light behaves both as a particle and as a wave. Hope this answers the question. Have a nice day.

3 0

3 years ago

Where in the laboratory is long, unrestrained hair most likely to be a safety concern?

antiseptic1488 [7]

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3 years ago

A car travels at 12 m/s. The car then accelerates at 3 m/s2 until it reaches a speed of 18m/s.

Galina-37 [17]

Answer:

С. 30 m

Explanation:

Given the following data;

Initial velocity, U = 12m/s

Final velocity, V = 18m/s

Acceleration, a = 3m/s²

To find the distance, we would use the third equation of motion;

V ² = U² + 2aS

Substituting into the equation, we have

18² = 12² + 2*3*S

324 = 144 + 6S

6S = 324 - 144

6S = 180

S = 180/6

Distance, S = 30 meters.

3 0

3 years ago

In useful fusion, smaller nuclei fuse together into larger nuclei and also produce : black hole entropy

NeTakaya

Answer:

energy from excess mass

Explanation:

The correct answer for the given question out of the given options is the option " energy from excess mass ".

This happens due to the fact that some of the matter is converted into the energy during the fusion of atoms.

The relation that can be stated is E = mc²

where,

E is the energy

c is the speed of the light

m is the mass of the matter

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4 years ago

A student forms the following hypothesis if people wear bright colors, they will be happier. What is/are the problems with this

mars1129 [50]

There is no scientific evidence to support this claim. And it is not telling what colors are needing to be worn only the stated bright colors which can mean an assortment of things.

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3 years ago