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kvv77 [185]
4 years ago
8

Whose law states that an induced current will create a magnetic field?

Physics
1 answer:
Zarrin [17]4 years ago
7 0
Lenz law states the law
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URGENT PLZ HELPPP!
Dovator [93]

λ = 3.125 m

λ = 2.83 m

<h3>Further explanation</h3>

Given

Frequency of radio : 96 MHz and 106 MHz

Required

The wavelength

Solution

Wavelength : from the crest to the crest of the next wave or the trough to the trough

Frequency (f): number of waves in one second

v = λ x f

λ = v : f

Input the value :

f = 96 MHz = 96 x 10⁶ Hz

λ = v : f

λ = 3 x 10⁸ :  96 x 10⁶

λ = 3.125 m

f = 106 MHz = 106 x 10⁶ Hz

λ = v : f

λ = 3 x 10⁸ :  106 x 10⁶

λ = 2.83 m

6 0
3 years ago
Please someone derive 3rd equation of motion u- v= 2sa​
zlopas [31]

We know

\\ \sf\longmapsto a=\dfrac{dv}{dt}

\\ \sf\longmapsto a=\dfrac{dv}{dx}.\dfrac{dx}{dt}

\\ \sf\longmapsto a=v\dfrac{dv}{dx}

\\ \sf\longmapsto adx=vdv

  • Integrate

\\ \sf\longmapsto a{\displaystyle{\int}^x_{x_0}}dx=\displaystyle{\int}_u^v vdv

\\ \sf\longmapsto a(x-x_0)=\dfrac{v^2-u^2}{2}

Here

  • x-x_0=s

\\ \sf\longmapsto v^2-u^2=2as

6 0
3 years ago
Read 2 more answers
A merry-go-round accelerating uniformly from rest achieves itsoperating speed of 2.5rpm in five revolution.
g100num [7]

Answer:

(A) The magnitude of its angular acceleration 1.09 x 10⁻³ rad/s²

(B) Time of motion 240.2 s

Explanation:

Given;

final angular speed, ωf = 2.5 RPM

angular distance, θ = 5 rev = 5 x 2π = 10π rad

initial angular speed, ωi = 0

final angular speed in rad/s;

\omega_f = \frac{2.5 \ rev}{min} \times \ \frac{2\pi}{1 \ rev} \times \ \frac{1 \min}{60 s} = 0.2618 \ rad/s \\

(A) the magnitude of its angular acceleration(rad/s^2);

\omega_f^2 = \omega_i^2 + 2\alpha \theta\\\\(0.2618)^2 = 0 + (2\times 10\pi)\alpha\\\\0.0685 = 20\pi \alpha\\\\\alpha = \frac{0.0685}{20\pi} \\\\\alpha = 1.09\times 10^{-3} \ rad/s^2

(B) Time of motion;

\omega_f = \omega_i + \alpha t\\\\0.2618 = 0 + 1.09\times 10^{-3} t\\\\t = \frac{0.2618}{1.09\times 10^{-3}} \\\\t = 240.2 \ s

7 0
3 years ago
Name three ways a workout in the healthy heart zone benefits your health
babymother [125]
Peak. Intensity: Vigorous (85 to 100 percent of your max heart rate) Benefit: Increases performance speed.
Cardio. Intensity: Hard (70 to 84 percent of your max hr) Benefit: Builds cardiovascular fitness and muscle strength.
Fat Burn. Intensity: Moderate (50 to 69 percent of your max hr)
7 0
3 years ago
Which of the following countries exclusively use the metric system? United States France England Canada
nadya68 [22]

The only three countries who do not use the metric system as their primary system of measurement are the United States, Liberia and Burma (Myanmar). Other countries have adopted the system but do not use it in all cases, for example road distances and speeds are still measured in miles and miles per hour in the United Kingdom.

5 0
4 years ago
Read 2 more answers
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