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3 years ago

How could you work out the direction that the motor will turn

2 answers:

8 0

Electric motors use the motor effect. A simple electric motor can be built using a coil of wire that is free to rotate between two opposite magnetic poles. When an electric current flows through the coil, the coil experiences a force and moves. One side moves up and the other side moves down. The direction of the current must be reversed every half turn, otherwise the coil comes to a halt again. This is achieved using a conducting ring split in two, called a split ring or ‘commutator’.

IgorLugansk [536]3 years ago

5 0

If you mean work out as in using calculations, I don't know how to help you. But there is a way to find out, using Fleming's left hand rule. I can't define it properly, and I don't want to copy-paste from another site, so I strongly recommend that you look it up. Try google, or more specific, BBC GCSE bitesize.

Hope this helps!

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4. For the following questions, use a periodic table and your atomic calculations to find the unknown information about each iso

natita [175]

The answer is 7 (its like the only question thats easy so far lol)

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4 years ago

You're driving your new sports car at 85 mph over the top of a hill that has a radius of curvature of 525 m.

Bumek [7]

Explanation:

It is given that,

Speed of the sports car, v = 85 mph = 37.99 m/s

The radius of curvature, r = 525 m

Let $W_N$ is the normal weight and $W_A$ is the apparent weight of the person. Its apparent weight is given by :

$W_A=mg-\dfrac{mv^2}{r}$

So, $\dfrac{W_A}{W_N}=\dfrac{mg-\dfrac{mv^2}{r}}{mg}$

$\dfrac{W_A}{W_N}=\dfrac{g-\dfrac{v^2}{r}}{g}$

$\dfrac{W_A}{W_N}=\dfrac{9.8-\dfrac{(37.99)^2}{525}}{9.8}$

$\dfrac{W_A}{W_N}=0.719$

$\dfrac{W_A}{W_N}=71.9\%$

Hence, this is the required solution.

5 0

4 years ago

How does matter and energy interact to produce weather patterns?

Nina [5.8K]

<u><em>How Does Matter And Energetic Interact To Produce Weather Patterns?</em></u>

<h3>Weather is caused by different levels of humidity and the difference in the temperature of air which causes wind patterns. Energy from the sun evaporates the water on land. Air also heats up which brings up the water vapor to the atmosphere. This increases the humidity and the chance of rain. When hot is found near the land, this will create a high pressure which will prevent the formation of clouds and produce a fair weather.</h3>

7 0

3 years ago

What form of energy does a compressed spring have?

Katen [24]

Potential energy.. it stores energy when it is in compressed form...

3 0

3 years ago

Read 2 more answers

Assume 10,000 electrons were transferred from your hair to the balloon. a.What is the charge in Coulombs on the balloon? b.What

IgorLugansk [536]

Answer:

a. the charge on the balloon is -1.602^-15 C

b. the charge on the hair is 1.602^-15 C

c. the force is -2.3*10^-16 N

Explanation:

a. 1 electron has charge of -1.602*10^-19 C

10,000 then has a charge of 10000*-1.602*10^-19 = -1.602^-15 C

b. The charge gained by the balloon is equal in measure but with the opposite sign to the change in the hair

c. From Coulomb's law the force is:

F = k*q1*q2/r²

where k = 9×10^9 N*m²/C², q1 and q2 are the charges, and r is the distance (in meters). Replacing with data:

F = 9×10^9*-1.602^-15*1.602^-15/0.01²

F = -2.3*10^-16 N

3 0

4 years ago