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Fed [463]
3 years ago
13

A thin 14.7 m long copper rod in a uniform magnetic field has a mass of 49.0 g. When the rod carries a current of 0.317 A, it fl

oats in the magnetic field. What is the field strength of the magnetic field?
Physics
1 answer:
MatroZZZ [7]3 years ago
3 0
F_B = ILBsin \theta

F force
I current
L length of wire in magnetic field
B magnetic field strength
θ angle between wire and magnetic field

if θ = 90°

B = \frac{F_B}{IL} \\ \\ F_B = F_G = mg \\ \\ B = \frac{mg}{IL} = \frac{0.049* 9.81 }{0.317*14.7}
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A car accelerates from rest to 27 m/s in 8 seconds. What is the acceleration of the car?
Vlad1618 [11]

Answer:

<h3>The answer is 3.38 m/s²</h3>

Explanation:

The acceleration of an object given it's velocity and time taken can be found by using the formula

a =  \frac{v}{t}  \\

where

a is the acceleration

v is the velocity

t is the time

From the question

v = 27 m/s

t = 8 s

We have

a =  \frac{27}{8}  \\  = 3.375

We have the final answer as

<h3>3.38 m/s²</h3>

Hope this helps you

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3 years ago
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True

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sleet_krkn [62]

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