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tiny-mole [99]
3 years ago
7

The ___of a wave is the number of wavelengths that pass a fixed point in a second.

Physics
1 answer:
creativ13 [48]3 years ago
7 0

the frequency of a wave is the number of wavelengths that pass a fixed point in a second.

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A wire of resistance 7 ohms and length 2.8 m is bent into a circle and is concentric with a solenoid in which the magnetic flux
Serggg [28]

Answer:

The emf, electric field and the current in the wire are 10 V, 3.57 V/m and 1.43 A.

Explanation:

Given that,

Resistance = 7 ohms

Length = 2.8 m

Time t =0.2

We need to calculate the change in magnetic flux

Using formula of induced emf

\epsilon=\dfrac{d\phi}{dt}

Put the value into the formula

\epsilon=\dfrac{6-4}{0.2}

\epsilon=10\ V

We need to calculate the electric field in the wire

Using formula of electric field

E=\dfrac{V}{l}

E=\dfrac{10}{2.8}

E=3.57\ V/m

We need to calculate the current in the wire,

Using formula of ohm's law

V=IR

I=\dfrac{V}{R}

Put the value into the formula

I=\dfrac{10}{7}

I=1.43\ A

Hence, The emf, electric field and the current in the wire are 10 V, 3.57 V/m and 1.43 A.

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3 years ago
Help! Please???
Andre45 [30]
Well for the The weather on the coast of Virginia is probably warm and dry. A cold front would likely bring <span>rain or rainstorms. would be B Rainstorms</span>
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3 years ago
What goes through evaporation
Olegator [25]
Water goes through evaporation.
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The period of a simple pendulum in a grandfather clock on another planet is 1.80 s. What is the acceleration due to gravity (in
weeeeeb [17]

Answer:

12.17 m/s²

Explanation:

The formula of period of a simple pendulum is given as,

T = 2π√(L/g)........................ Equation 1

Where T = period of the simple pendulum, L = length of the simple pendulum, g = acceleration due to gravity of the planet. π = pie

making g the subject of the equation,

g = 4π²L/T²................... Equation 2

Given: T = 1.8 s, l = 1.00 m

Constant: π = 3.14

Substitute into equation 2

g = (4×3.14²×1)/1.8²

g = 12.17 m/s²

Hence the acceleration due to gravity of the planet = 12.17 m/s²

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3 years ago
A temperature of 50F is equal to c
Hitman42 [59]

10.00 °C this is the right answer need more question feel free to post

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3 years ago
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