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poizon [28]
3 years ago
14

What is the maximum speed at which a car can safely travel around a circular track of radius 75.0 m if the coefficient of fricti

on between the tire and road is 0.200?
A) 3.87 m/s
B) 12.1 m/s
C) 15.0 m/s
D) 147 m/s
Physics
1 answer:
Rina8888 [55]3 years ago
3 0

Answer:

B) 12.1 m/s

Explanation:

Sum of the forces in the y direction:

∑F = ma

N − mg = 0

N = mg

Sum of the forces in the radial direction:

∑F = ma

F = m v² / r

Nμ = m v² / r

Substituting and solving for v:

mgμ = m v² / r

gμ = v² / r

v = √(gμr)

Given that μ = 0.200 and r = 75.0 m:

v = √(9.81 m/s² × 0.200 × 75.0 m)

v = 12.1 m/s

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Answer:

n_cladding = 1.4764

Explanation:

We are told that θ_max = 5 °

Thus;

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θ_c = 90° - 5°

θ_c = 85°

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7 0
3 years ago
Which type of reaction does this diagram represent?
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<h3>What is a nuclear fission reaction?</h3>

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4 0
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Two oppositely charged but otherwise identical conducting plates of area 2.50 square centimeters are separated by a dielectric 1
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Answer: 38.2 μC

Explanation: In order to solve this problem we have to use the relationship for a two plate capacitor with a dielectric  so:

C= Q/V= we also know that for two paralel plates C=εo*k*A/d and V=E/d

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Q/A=σ= E*k/εo= 1.2 * 10^6*3.6/8.85 * 10^-12=38.2μC

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