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docker41 [41]
2 years ago
13

What are three examples of noncontact forces​

Physics
1 answer:
-Dominant- [34]2 years ago
8 0

Answer:

gravitational force electric force and magnetic force

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A baseball with a mass of 0.15 kg is moving at a speed of 40 m/s. What is
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Answer:

120 J

Explanation:

KE = mv²/2 = (0.15 kg * [40 m/s]²)/2 = 120 J

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3 years ago
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A man pushed the box with a force of 20 N. He doubled his force to 40 N. The box did not
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Answer:

A

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The size (radius) of an oxygen molecule is about 2.0 ×10−10 m. Make a rough estimate of the pressure at which the finite volume
timurjin [86]

Answer:

P = 1 x 10⁸ Pa

Explanation:

given,

radius = 2.0 ×10⁻¹⁰ m

Temperature

T = 300 K

Volume of gas molecule =

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V = \dfrac{4}{3}\pi (2\times 10^{-10})^3

 V = 33.51 x 10⁻³⁰ m³

we know,

P  V = 1 . k T

k = 1.38  x 10⁻²³ J/K

P(33.51 x 10⁻³⁰) = 1 . (1.38  x 10⁻²³) x 300

P = 1.235 x 10⁸ Pa

for 1 significant figure

P = 1 x 10⁸ Pa

6 0
3 years ago
Which of the following shows the units of angular motion?
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Answer:

  • The units are <em>(</em><em>rad</em><em>/</em><em>s</em><em>^</em><em>2</em><em>)</em><em> </em>
4 0
3 years ago
A pencil sharpener has a handle with a radius of 1.5 cm. The sharpening mechanism has a radius of 0.5 cm. What is the IMA of the
abruzzese [7]
1.5 / 0.5 = 3 I believe this is the right answer
8 0
3 years ago
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