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Viktor [21]
2 years ago
5

A car has an initial velocity of 20m/s and an average velocity of 30m/s.

Physics
1 answer:
Luba_88 [7]2 years ago
3 0

Answer:

call 7194936846 and ill help u out

Explanation:

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An electric motor rotating a workshop grinding wheel at a rate of 151 rev/min is switched off. Assume constant angular decelerat
tamaranim1 [39]

Answer:

Explanation:

Initial angular velocity ω₀ = 151 x 2π / 60

= 15.8  rad /s

final velocity = 0

Angular deceleration α = 2.23 rad / s

ω² = ω₀² -  2 α θ

0 = 15.8² - 2 x 2.23 θ

= 55.99  rad

one revolution = 2π radian

55.99 radian = 55.99  / 2 π no of terns

= 9 approx .

8 0
3 years ago
Which best describes the act of using senses or tools to gather information
Delicious77 [7]

Answer:

The act of using senses or tools to gather information is called <em>Obser</em><em>vation</em><em>.</em>

3 0
3 years ago
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1.Which of the following is evidence that the Earth is round?
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Answer:

1\D. Both A and C

2\A true

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3 years ago
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How is cold front formation different from stationary front formation?
padilas [110]

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A

Explanation:

4 0
3 years ago
Kelli weighs 440 N, and she is sitting on a playground swing that hangs 0.41 m above the ground. Her mom pulls the swing back an
kifflom [539]

Answer:

Explanation:

Initial height from the ground = .41 m

Final height = 1m

Height by which Kelli was raised ( h )= .59 m

When she passes through the lowest point , she loses P E

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= 440 x .59

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kinetic energy possessed by her

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= 89.8 J

Difference of energy is lost due to work by  air friction

work done by  friction = 89.8 - 259.6

= - 169.8 J

4 0
3 years ago
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