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Art [367]
3 years ago
5

What did the protoplanets become?

Physics
2 answers:
alexira [117]3 years ago
7 0

What did the protoplanets become?

a. nebulae
b. planets
c. solar nebulae
d. planetesimals

The protoplanets become nebulae. The answer is letter A. The rest of the choices do not answer the question above.

nataly862011 [7]3 years ago
7 0

The answer is B. Planets

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A water rocket can reach a speed of 75 m/s in 0.050 seconds from launch. What is its average acceleration?
yanalaym [24]
A=v/t
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Answer:

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Explanation:

The correct answer is option A

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3 years ago
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A 416 kg merry-go-round in the shape of a horizontal disk with a radius of 1.7 m is set in motion by wrapping a rope about the r
kipiarov [429]

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Explanation:

Given;

mass of the merry-go-round, m = 416 kg

radius of the disk, r = 1.7 m

angular speed of the merry-go-round, ω = 3.7 rad/s

time of motion, t = 2.9 s

The torque exerted on the merry-go-round is calculated as;

\tau = Fr= I\alpha\\\\\tau = (\frac{1}{2}  m r^2)(\frac{\omega }{t} )\\\\\tau = (\frac{1}{2} \times 416 \times 1.7^2)( \frac{3.7}{2.9} )\\\\\tau = 766.95 \ Nm

Therefore, the torque exerted on the merry-go-round is 766.95 Nm

6 0
3 years ago
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Gnesinka [82]

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The distance of the object from the concave mirror determines if it is a virtual or real image

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Concave mirrors form both real and virtual images. When the concave mirror is placed very close to the object, a virtual and magnified image is obtained and if we increase the distance between the object and the mirror, the size of the image reduces and real images are formed.

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