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3 years ago

True or False? Anything that moves up and down or back and forth in a rhythmic way is vibrating.

1 answer:

5 0

True, for example, sound waves are known for vibrating and they move up and down in a particular pattern depending on the pitch and volume. :) Hope this helps x

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Two stars M1 and M2 of equal mass make up a binary star system. They move in a circular orbit that has its center at the midpoin

ozzi

Answer:

V = 365643.04 m/s

Explanation:

mass of the sun = 1.99 x 10^{30} kg

mass of M1 = mass of M2 = 6.95 solar mass = 6.95 x 1.99 x 10^{30} = 13.8305x 10^{30} kg

orbital period of each star (T) = 2.20 days = 2.20 x 24 x 60 x 60 =190,080 s

gravitational constant (G) = 6.67 x 10^{-11} N m2/kg2

orbital speed (V) = $\sqrt{\frac{G(M1+M2)}{r} }$

we need to find the orbital radius (r) before we can apply the formula above and we can get it from Kepler's third law, $T^{2} = r^{3}$ x k

where

T = orbital period

r = orbital radius

k = $\frac{4n^{2} }{G(M1+M2)}$ (take note that π is shown as $n$ )

making r the subject of the formula we now have

$r = (\frac{G(M1+M2).T^{2}}{4n^{2} } )^{\frac{1}{3} }$ (take note that π is shown as $n$ )

$r = (\frac{ 6.67 x 10^{-11} ( 13.8305x 10^{30}+ 13.8305x 10^{30} )x190080^{2}}{4x3.142^{2} } )^{\frac{1}{3} }$

r = 1.38 x 10^{10} m

Now that we have the orbital radius (r) we can substitute all required values into the formula for orbital speed

orbital speed (V) = $\sqrt{\frac{G(M1+M2)}{r} }$

$V = \sqrt{\frac{6.67 x 10^{-11} ( 13.8305x 10^{30}+ 13.8305x 10^{30}}{1.38 x 10^{10} } }\\$

V = 365643.04 m/s

3 0

3 years ago

How does speed affect momentum

Arada [10]

Momentum = mass • velocity
M = m • v

Speed is a scalar quantity
Velocity is a vector quantity

That is truly the only difference

8 0

3 years ago

Read 2 more answers

What is the difference between work done by the gravitational force on descending and ascending objects?

Kazeer [188]

<span>The difference between work done by the gravitational force on descending and ascending objects is that for descending objects a terminal velocity will be reached where the object will not fall any faster that it already is. For an ascending object, its velocity will come down the longer gravity has an effect on it until the object begins to descend and the velocity of an ascending object will continue to change the longer gravity has an effect on it.</span>

8 0

3 years ago

A 30.0 kg object rests on a flat, frictionless surface. A rope lifts up on the object with a force of 309 N. What is the acceler

saveliy_v [14]

Total force = Frope - mg = 309-300
total force = ma
9 = 30a

4 0

3 years ago

A jogger runs by a river with a velocity of 7 m s relative to the ground. A leaf floating on the river moves with a velocity of

Hunter-Best [27]

Answer:

The velocity of the leaf relative to the jogger is 5 m/s.

Explanation: