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Alisiya [41]
2 years ago
14

Please help me!!

Physics
1 answer:
den301095 [7]2 years ago
6 0
  1. For objects like insulators (plastics), they can get charged by <u>Friction</u><u>.</u>
  2. For metals, where there are more loosely bound electrons, they can get charged without contact by<u> </u><u>induction</u>
  3. For metals, they can also be charged by direct contact by <u>Electrostatic Induction</u><u>.</u>

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Which of the following best explains why clear-cutting forests is more destructive than selectively cutting down trees in forest
garri49 [273]
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6 0
4 years ago
Read 2 more answers
A single-turn circular loop of wire that has a radius of 3.5 cm lies in the plane perpendicular to a spatially uniform magnetic
Lena [83]

Explanation:

Given that,

Radius of the circular loop, r = 3.5 cm = 0.035 m

(a) During a 0.12-s time interval, the magnitude of the field increases uniformly from 0.2 T to 0.5 T. Due to the change in the magnetic field, an emf will induced in it. The magnitude of induced emf is given by :

\epsilon=-\dfrac{d(BA)}{dt}\\\\\epsilon=-\pi r^2\dfrac{B_f-B_i}{dt}\\\\\epsilon=-\pi (0.035)^2\dfrac{0.5-0.2}{0.12}\\\\\epsilon=-9.62\times 10^{-3}\ volts

So, the magnitude of the emf induced in the loop during the time interval is 9.62\times 10^{-3}\ V.

(b) The negative sign shows that the direction of induced emf in the loop is in anitclockwise direction.

5 0
3 years ago
What type of relationship does this graph show?
Basile [38]

Answer:

An nonlinear inverse relationship

Explanation:

7 0
3 years ago
Urgently!
adelina 88 [10]

Answer:

0.003333 s to 0.000125s or from 3.33ms to 0.125ms wher m is for milli

1.1m to 0.04125 m

Explanation:

T= 1/f=

if f= 300Hz then T = 1/300 =0.003333 s

if f= 8000 then T= 1/8000 = 0.000125s

now v=f×wave length

or wavelength = speed/ frequency

when f = 300 Hz

wavelength = 330/300=1.1 m

wavelength = 330/8000 = 0.04125m

note : i have taken speed of sound as 330 m/s you can take any value given in between 330m/s to 340m/s

6 0
3 years ago
Describe briefly the potential energy it has ( roller coaster)
jek_recluse [69]

Answer:

The energy that it starts with at the top of the inclinede Plane

Explanation:

Hope I helped:)

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3 years ago
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