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Sholpan [36]
4 years ago
15

PLEASE HELP!!!!!!!! ONLY IF UR 100% SURE!!!!!!!!!!!!!!

Physics
1 answer:
Svetach [21]4 years ago
6 0

D. Wrap an insulated wire around a metal with ferromagnetic properties and apply an electric current.

<u>The magnetic field is turned off when an induced current is not present. </u>

<u>Thus, an electromagnet would act as a magnet </u><em><u>only </u></em><u>when a current is induced in an insulated wire that is wrapped around a material of ferromagnetic material such as iron core rotating in a magnetic field. </u>

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The wave length of violet light rounded to the nearest nanometer is a __ nm
nataly862011 [7]
Wavelength= speed / frequency 

so.....3× 10^8 / 7.26×10^14
= .413× 10^(-6)

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3 years ago
What is the definition of dynamics in physics
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A step-down transformer has more loops on which coil?
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6 0
4 years ago
Read 2 more answers
A car slows down from 50 mph to 35 mph in 5 seconds. Calculate its acceleration (or deceleration).
statuscvo [17]
-4.4 ft/s^2

Explanation:

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6 0
3 years ago
A typical incandescent light bulb consumes 75 W of power and has a mass of 30 g. You want to save electrical energy by dropping
nadya68 [22]

Answer:

The height will be 917431.2 m.

Explanation:

Power of bulb = 75 W

Time kept on 1 hr = 60 x 60 = 3600 sec

Energy of bulb = power x time

E = 75 x 3600 = 270000 J

From conservation of energy, kinetic energy of the bulb is equal to the potential energy of the bulb due to its height of fall.

Potential energy = m x g x h

Where g = acceleration due to gravity 9.81 m/s2

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Equating withe the energy of bulb (still obeying energy conservation)

270000 = 0.2943h

h = 270000/0.2943 = 917431.2 m

8 0
4 years ago
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