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3 years ago

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Question 2 of 5 Instructions:Select the correct answer. What do scientists use to determine the temperature of a star? thermomet

er distance from Earth composition color NextReset

2 answers:

Lena [83]3 years ago

4 0

Scientists use the color of a star to determine its temperature.
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Darya [45]3 years ago

4 0

Answer:

Color

Explanation:

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Complete the statement by filling in the Blanks:

Anika [276]

Answer:

induced current

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intentionally manipulated.

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2 years ago

Which of the following most directly shows how physics affects society?

Nataliya [291]

the answer is definitely A.

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2 years ago

Explain why frog will not look green under the red light?

IrinaVladis [17]

A frog can be many different colours. It appears green under normal 'white' light because it absorbs all the other colours in the light's spectrum apart from green. It reflects the green light back and that is picked up by your eye.

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2 years ago

You drop a rock down a well that is 5.4 m deep. How long does it take the rock to hit the bottom of the well?

Natali5045456 [20]

Equation of motion:

$y_{f}=y_{o}+v_{o}t+ \frac{1}{2} at^{2}$

Since initial velocity is zero, the second term goes away:

$y_{f}=y_{o}+0+ \frac{1}{2} at^{2}$

$y_{f}=y_{o}+\frac{1}{2} at^{2}$

$y_{f}-y_{o}= \frac{1}{2} at^{2}$

$y_{f}-y_{o}=5.4m$

$5.4m= \frac{1}{2} at^{2}$

$\frac{2(5.4m) }{a} = t^{2}$

$a = g = 9.81 \frac{m}{ s^{2}}$

$\frac{2(5.4m) }{9.81 \frac{m}{ s^{2} } } = t^{2}$

$1.1 s^{2} = t^{2}$ $\sqrt{1.1 s^{2}} = \sqrt{t^{2}}$

<u><em> $t = 1.05s$ </em></u>

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3 years ago

Read 2 more answers

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Lisa [10]

The awnsers is D all the planet's in the solar system rotate the same direction or else they would bump into each other

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2 years ago