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Naya [18.7K]
3 years ago
6

The 5.00-cm-long second hand on a watch rotates smoothly. What is its angular velocity?

Physics
1 answer:
Masteriza [31]3 years ago
7 0
The angular velocity o
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An alpha particle (charge +2e) and an electron move in opposite directions from the same point, each with the speed of 2.80×10^5
Evgesh-ka [11]

Answer:

Explanation:

Magnetic field due to moving charge =

B=\frac{\mu_0}{4\pi} \times \frac{qv}{r^2}

q is charge moving with velocity v and r is distance from point at which field is calculated .

For alpha particle

B_1=\frac{\mu_0}{4\pi} \times \frac{2\times 1.6\times10^{-19}\times 2.8\times 10^5}{(8.25\times 10^{-9})^2}

= 0.1316 x 10⁻³ T

For electron

B_2=\frac{\mu_0}{4\pi} \times \frac{ 1.6\times10^{-19}\times 2.8\times 10^5}{(8.25\times 10^{-9})^2}

= .0658 x 10⁻³ T .

Both these magnetic field will be same in direction because direction of equivalent current is same for both the particles .

Hence

Total magnetic field

= B₁ + B₂ = .1974 x 10⁻³

= 1.974 x 10⁻⁴ T .

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3 years ago
What is the question at the center of the situation discussed in the video?
VashaNatasha [74]

Answer:

44

Explanation:

jk you didnt share the video lol

7 0
3 years ago
How coal power plants produce electrical energy to power our homes
balandron [24]
Coal plants use a boiler to produce steam.
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A and B Two vectors are in the xy plane. If 4= 3m , |B|= 4m , and |A– B= 2 m find
ziro4ka [17]

Answer:

Explanation:

a)

A = 3m , B = 4m .

(A-B)² = A² + B² - 2ABcosθ where θ is angle between A and B.

4 = 9 + 16 - 2. 3.4 cosθ

cosθ = .875

θ = 29° .

b ) Unit vector in the direction of A X B will be k vector because A and B are in X-Y plane and A X B lies perpendicular to both A and B .

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A mountain climber packs too much gear and finds it difficult to reach the summit before a storm blows in. How does this scenari
MissTica

As the climber climbs the mountain, he needs to over his or her own weight component along the slope of the mountains.

By Newton's second law: Net force = Mass x acceleration

Hence, greater the mass, greater will be the force required to move up the mountain. Hence, the climber will need to apply higher force to climb up as he or she has packed too much, which resulted in the increase in the mass. Hence, there is a increase in the force which will pull him or her downward.

5 0
3 years ago
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