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3 years ago

5

Stars are powered by _____ reactions.

2 answers:

goldenfox [79]3 years ago

5 0

the answer is fusion...............................................

siniylev [52]3 years ago

3 0

They are powered by fusion reactions

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You are moving at a speed 2/3 c toward randy when randy shines a light toward you. at what speed do you see the light approachin

yarga [219]

I see the light moving exactly at speed equal to c.

In fact, the second postulate of special relativity states that:
"The speed of light in free space has the same value c<span> in all inertial frames of reference."
</span>
The problem says that I am moving at speed 2/3 c, so my motion is a uniform motion (constant speed). This means I am in an inertial frame of reference, so the speed of light in this frame must be equal to c.

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3 years ago

A potter's wheel has the shape of a solid uniform disk of mass 13.0 kg and radius 1.25 m. It spins about an axis perpendicular t

Fittoniya [83]

Answer: $10.82 kg-m^2$

Explanation:

Given

Mass of solid uniform disk $M=13 kg$

radius of disk $r=1.25 m$

mass of lump $m=1.7 kg$

distance of lump from axis $r_0=0.63$

Moment of inertia is the distribution of mass from the axis of rotation

Initial moment of inertia of disk $I_1=\frac{Mr^2}{2}$

$I_1=\frac{13\times 1.25^2}{2}=10.15 kg-m^2$

Final moment of inertia $I_f$ =Moment of inertia of disk+moment of inertia of lump about axis

$I_f=\frac{Mr^2}{2}+mr_0^2$

$I_f=10.15+1.7\times 0.63^2$

$I_f=10.15+0.674$

$I_f=10.82 kg-m^2$

3 0

4 years ago

When measurements are close to their true values, they are said to be

katovenus [111]

Answer:

When measurements are close to true

value they are called to be accurate

Explanation:

3 0

3 years ago

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Now, using your mass (in kg), and the figures for g (in the table below), you can calculate your weight on other planets.

Licemer1 [7]

Answer:

1) Weight on Mercury

$F =W=mg=68.11 \times 3.61 m.s^{-2}$

Explanation:

do the same to the rest and use your calculator to find the weight in N.

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3 years ago

what happens to the current across a circuit when the voltage is doubled while the resistance is held back

Lynna [10]

Since the current is inversely propotional to its resistance, when the voltage is doubled the current will be one-half

7 0

3 years ago

Read 2 more answers