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3 years ago

Light from the sun reaches Earth in 8.3min. The speed of light is 3.00 x 10^8 m/s. How far is the Earth from the sun?

Physics

2 answers:

ruslelena [56]3 years ago

8 0

Speed= distance/ time
distance= speed×time
distance= 3×10^8 × 8.3× 60
1494×10^8

strojnjashka [21]3 years ago

5 0

The answer is this, but i don't know how to simplify it. 3x^100000000<span />

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Answer:

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3 years ago

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so here we can say that total energy is conserved

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as we know that ball start from rest

$v_i = 0$

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also we know that

$480 = m*9.8$

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now plug in all data in above equation

$480*9.60 + 0 = \frac{1}{2}*49*(0.40*\omega)^2 + \frac{1}{2}*\frac{2}{5}*49*(0.40)^2\omega^2 + 0$

$4608 = 3.92\omega^2 + 1.568\omega^2$

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3 years ago

The Golden Gate Bridge in San Francisco has a main span of length 1.28 km, one of the longest in the world. Imagine that a steel

Valentin [98]

Answer:

361.46 N

Explanation:

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Y = Young's modulus for steel = $20\times 10^{10}\ Pa$

A = Area = $3.1\times 10^{-6}\ m^2$

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Also,

$\Delta L=\dfrac{L_0T}{YA}$

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The tension in the wire is 361.46 N

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