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Eduardwww [97]
3 years ago
8

following statement supports which theory? "Astronomers have observed protoplanetary disks around distant newborn stars." Big Ba

ng theory Nebular theory Cell theory String theory
Physics
2 answers:
Ad libitum [116K]3 years ago
8 0

Answer:

nebular theory

Explanation:

Irina-Kira [14]3 years ago
5 0

Answer: B

Nebula theory

Explanation:

Nebular Theory: This states that the solar system developed out of an interstellar cloud of dust and gas, called a nebula. If astronomers have observed protoplanetary disks around distant newborn stars, the Sun-to-be collected most of the mass in the nebula's center, forming a Protostar

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Suppose that Salim hits a 100 g fastball moving towards him at a speed of 42 m/s with his bat as shown in the image.the impulse
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The final momentum of the ball is 3.8 kgm/s.

<h3>Change in momentum of the ball</h3>

The impulse received by the ball is equal to change in momentum of the ball.

J = ΔP

where;

  • J is the impulse
  • ΔP is change in momentum

ΔP = P₂ - P₁

P₂ = ΔP + P₁

<h3>Final momentum of the ball</h3>

The final momentum of the ball is calculated as follows;

P₂ = 8 + (- 0.1 x 42)

P₂ = 8 - 4.2

P₂ = 3.8 kgm/s

Learn more about change in momentum here: brainly.com/question/7538238

3 0
2 years ago
A 0.810 kg ball falls 2.5m. How much work does the force of gravity do on the ball?
lisabon 2012 [21]

Answer:

W = 19.845 J

Explanation:

Work is defined as W = Fdcos\theta, where F is the force exerted and d is the distance. Because the direction the ball is falling is the same direction as the force itself, \theta = 0 deg, and since cos(0) = 1, this equation is equivalent to W = Fd. In this case, the force exerted is the weight force, which is equivalent to m * g. Substituting you get:

W = mgd = 0.810 kg * 9.8 m/s^2 * 2.5m

W = 19.845 J

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2 years ago
Calculate the potential energy of 5.0g (0.005 kg) paper airplane 5.0 meters above the ground
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PE = (mass) (gravity) (height)

PE = (0.005 kg) (9.8 m/s²) (5 m)

<em>PE = 0.245 Joule</em>

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3 years ago
If a wave hits a smooth surface at an angle of incidence of 40 degrees, the angle of reflection is
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As the surface given is a smooth surface, we can use specular reflection. According to the law of specular reflection, the angle of incidence equals the angle of reflection, so it will also be 40°. Answer is A.
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3 years ago
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The plunger of a syringe is pulled up halfway, as shown in the picture. With the plunger in this position, how does the volume o
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Explanation. A gas will expand to fill its container. Pulling the plunger of the syringe creates a low pressure inside the syringe (a vacuum)

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