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zhenek [66]
3 years ago
10

True or false? Electrons can move, but positive charges can't.True or false? Electrons can move, but positive charges can't.

Physics
1 answer:
shepuryov [24]3 years ago
7 0

Answer:

true

Explanatio

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Given that o.2i+bj+o.4k is a unit vector,what is the value of b?
pishuonlain [190]

Answer:

b = 0.89

Explanation:

The given vector is, A=0.2i+bj+0.4k

A is a unit vector

We need to find the value of b.

For a unit vector, |A| = 1

So,

0.2^2+b^2+0.4^2=1\\\\0.04+b^2+0.16=1\\\\0.2+b^2=1\\\\b^2=1-0.2\\\\b=0.89

So, th value of b is 0.89.

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Which chemical reaction is most likely the slowest?
NemiM [27]
B. takes the longest!
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3 years ago
An electrical motor spins at a constant 2695.0 rpm. If the armature radius is 7.165 cm, what is the acceleration of the edge of
djyliett [7]

Answer:

Acceleration will be 5706.77rad/sec^2

So option (D) will be correct answer

Explanation:

We have given angular speed of the electrical motor \omega =2695rpm

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So \omega =2695rpm=2695\times \frac{2\pi }{60}=282.2197rad/sec

Armature radius is given r = 7.165 cm = 0.07165 m

We have to find the acceleration of edge of motor

Acceleration is given by a=\omega ^2r=282.2197^2\times 0.07165=5706.77rad/sec^2

So acceleration will be 5706.77rad/sec^2

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5 0
4 years ago
Which three elements have strong magnetic properties?
icang [17]

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Explanation:

4 0
4 years ago
T/F The outer planets have solid surfaces that are very rocky and dense
Luba_88 [7]

Answer:

False

Explanation:

the inner planets have solid rocky dense surfaces

6 0
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