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ale4655 [162]
3 years ago
12

A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 6.9 x 1020 m, and the angular spee

d of the star is 9.2 x 10-15 rad/s. How long (in years) does it take for the star to make one revolution around the center?
Physics
1 answer:
andrew-mc [135]3 years ago
8 0

Answer:

2.16 x 10^7 years

Explanation:

R = 6.9 x 10^20 m

ω = 9.2 x 10^-15 rad/s

T = 2π / ω

T = ( 2 x 3.14 ) / ( 9.2 x 10^-15)

T = 6.826 x 10^14 second

T = 2.16 x 10^7 years

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3 years ago
A fisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surfac
Y_Kistochka [10]

Answer:

See Explanation

Explanation:

a) We know that;

v = λf

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b)The amplitude of the wave is;

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Where d = 0.30 m

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6 0
3 years ago
What type of tide occurs on a full moon or a new moon?
DIA [1.3K]
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6 0
3 years ago
Read 2 more answers
Help please due by 3:00
FrozenT [24]

Answer:

  zero

Explanation:

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8 0
3 years ago
A ball of mass m, attached to the end of a horizontal cord, is rotated in a circle of radius r on a frictionless horizontal surf
kirza4 [7]

Answer:v=\sqrt{\frac{FL}{m}}

Explanation:

Given

Ball of mass m

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F=T=\frac{mv^2}{L}

v=\sqrt{\frac{FL}{m}}

8 0
3 years ago
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