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3 years ago

An object is swung in a horizontal circle on a length of string

Physics

1 answer:

Genrish500 [490]3 years ago

4 0

Answer: either 3.20s or 1.18s

Explanation:

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A solenoid has a radius Rs = 14.0 cm, length L = 3.50 m, and Ns = 6500 turns. The current in the solenoid decreases at the rate

babymother [125]

Answer:

E = 58.7 V/m

Explanation:

As we know that flux linked with the coil is given as

$\phi = NBA$

here we have

$A = \pi R_s^2$

$B = \mu_o N i/L$

now we have

$\phi = N(\mu_o N i/L)(\pi R_s^2)$

now the induced EMF is rate of change in magnetic flux

$EMF = \frac{d\phi}{dt} = \mu_o N^2 \pi R_s^2 \frac{di}{dt}/L$

now for induced electric field in the coil is linked with the EMF as

$\int E. dL = EMF$

$E(2\pi r_c) = \mu_o N^2 \pi R_s^2 \frac{di}{dt}/L$

$E = \frac{\mu_o N^2 R_s^2 \frac{di}{dt}}{2 r_c L}$

$E = \frac{(4\pi \times 10^{-7})(6500^2)(0.14^2)(79)}{2(0.20)(3.50)}$

$E = 58.7 V/m$

3 0

3 years ago

What happens to the object when positive velocity and positive acceleration occur?

erik [133]

The object increases in speed

7 0

3 years ago

A vector has an x-component of -26.5 and a y-component of 43 units. Find magnitude and direction of vector

tatiyna

Answer:

The vector has a magnitude of 33.86 units and a direction of 121.64°.

Explanation:

To find the magnitude, you use the Pitagorean theorem:

$||V|| = \sqrt{x^2 + y^2}= \sqrt{(-26.5)^2 + (43)^2} = 33.86 units$

In order to find the direction, you can use trigonometry. You have to keep in mind, that as the y component of the vector is positive and the x component is negative, the vector must have an angle between 90 and 180°, or in the second quadrant of the plane.:

$tan(\alpha) = \frac{y}{x} \\\alpha = tan^{-1}(\frac{43}{-26.5})= 180 - tan^{-1}(\frac{43}{26.5}) = 121.64$ ° or, 58.36° in the second quadrant

6 0

4 years ago

The minimum energy required for an effective collision is called

kifflom [539]

Answer:

Activation Energy

Explanation:

Effective collisions are those that result in a chemical reaction. In order to produce an effective collision, reactant particles must possess some minimum amount of energy. This energy, used to initiate the reaction, is called the activation energy.

6 0

4 years ago

I need help on EM spectrum and waves

Nutka1998 [239]

<h2>Answer:It is not affected by the change in media.</h2>

Explanation:

Transverse waves are those waves where the medium particles vibrate perpendicular to the direction of propagation.

Transverse waves do not require any medium.

They travel with same speed in any medium.

Electromagnetic waves are transverse waves where the medium particles vibrate perpendicular to the direction of propagation.

So,their speed is same in any medium.

3 0

4 years ago