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faltersainse [42]
3 years ago
14

Need on all if you can.

Physics
1 answer:
MAVERICK [17]3 years ago
6 0
10 would be the answer for number 3
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14. It takes an airplane nearly ¾ of a mile to stop. Which law of motion is being used?
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Newton’s first law because the airplane needs space to fully stop due to its inertia
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What relationship do you see between a star colour and temperature
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How far apart (in mm) must two point charges of 70.0 nC (typical of static electricity) be to have a force of 1.30 N between the
Sever21 [200]

Answer:r=5.824 mm

Explanation:

Given

Charge q_1=70 nC

q_2=70 nC

Force between them F=1.30 N

Electrostatic Force is given by

F=\frac{kq_1q_2}{r^2}

where q_1 and q_2 are the charge on the Particles

r=distance between them

k=Coulomb\ constant =9\times 10^9 N-m^2/C^2

1.3=\frac{9\times 10^9\times 70\times 70\times 10^{-18}}{r^2}

r^2=\frac{9\times 10^9\times 70\times 70\times 10^{-18}}{1.3}

r=\sqrt{33.923\times 10^{-6}}

r=5.824\times 10^{-3}

r=5.824 mm

5 0
3 years ago
An 1100-kg car traveling at 27.0 m/s starts to slow down and comes to a complete stop in 578 m. What is the magnitude of the ave
Trava [24]

Answer:

693.685 N

Explanation:

t = Time taken

u = Initial velocity = 27 m/s

v = Final velocity

s = Displacement = 578 m

a = Acceleration

m = Mass

Equation of motion

v^2-u^2=2as\\\Rightarrow a=\frac{v^2-u^2}{2s}\\\Rightarrow a=\frac{0^2-27^2}{2\times 578}\\\Rightarrow a=-0.63062\ m/s^2

Force

F = ma

F=1100\times -0.63062\\\Rightarrow F=-693.6851\ N

Magnitude of braking force required to stop the car is 693.685 N

7 0
3 years ago
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