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3 years ago

6

In a step-down transformer, which describes the primary winding compared with the secondary winding? A higher voltage and fewer

coils of wire B higher voltage and more coils of wire C lower voltage and fewer coils of wire D lower voltage and more coils of wire

2 answers:

kirill115 [55]3 years ago

7 0

B. Higher voltage and more coils of wire :)

kicyunya [14]3 years ago

5 0

B. higher voltage and more coils of wire

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A drum is struck first with little energy. The drum is then struck with a lot of energy. Which sound will be louder? Why?

Reil [10]

Answer:

The drum struck with a lot of energy would be louder than the drum struck with little energy because there is a harder impact on it

Explanation:

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3 years ago

5000 j of heat are added to a system. it does 3500 j of work on the surroundings. what is δe in j?

Alika [10]

<span>The Answer is 5200 Joules</span>

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3 years ago

The Earth's magnetic field is approximately 0.5 Gauss. What is the magnetic energy density of this field

ser-zykov [4K]

Answer:

The magnetic energy density is $E_B = 9.95 *10^{-4} \ J/m^3$

Explanation:

From the question we are told that

The earths magnetic field is $B = 0.5 \ Gauss$

Now

$1 \ Gauss \to 1 *10^{-4} \ T$

=> $0.5 \ Gauss \to x T$

So

$x = \frac{0.5 * 1*10^{-4}}{1}$

$x = B= 5.0 *10^{-5} \ T$

Generally the magnetic energy density is mathematically represented as

$E_B = \frac{B^2}{ 2 * \mu_o }$

Here $\mu_o$ is the permeability of free space with a constant value

$\mu_o = 4\pi * 10^{-7} N/A^2$

substituting values for equation above

$E_B = \frac{(5*10^{-5})^2}{ 2 * 4\pi * 10^{-7} }$

$E_B = 9.95 *10^{-4} \ J/m^3$

5 0

3 years ago

A chicken flaps off the roof of the henhouse with a velocity of 4.5 m/s north. The chicken lands 2.8 seconds later. If a hungry

katrin2010 [14]

I think that it might be B?
Tell me if im wrong

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3 years ago

A man walks 400 m in the direction 45° north of east. Represent this vector graphically by

Marrrta [24]

Answer:

Explanation:

Coordinate system is one that describe the location of an object in a given plane. It implies the use of axes (coordinates) and points.

Given that the man in the question walks 400 m due north of east. The cardinal points can be used in this case, with the north and east cardinals as the required axis.

scale = $\frac{length on drawing}{original length}$

= $\frac{10}{400}$

= $\frac{1}{40}$

scale = 1:40

This is a reduced scale which implies that 1 cm on the drawing is equal to 40 m on the original length.

The man's direction is $45^{o}$ north of east.

The graphical drawing of the vector is herewith attached to this answer.

5 0

3 years ago