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3 years ago

Investigation to find out relationship between the current in the coil and the force on the iron disc

Physics

2 answers:

Shtirlitz [24]3 years ago

3 0

Answer:

Electromagnets are made of coils of wire with electricity passing through them. Moving charges create magnetic fields, so when the coils of wire in an electromagnet have an electric current passing through them, the coils behave like a magnet.

Explanation:

polet [3.4K]3 years ago

3 0

Answer:

A second experiment can be carried out to investigate how the strength of the electromagnet ... Check that the current is still 0.5 A and repeat the paper clip reading. ... Repeat this process increasing the number of turns by 10 up to 60 coils.

Explanation:

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This chemical equation represents a ______________ reaction.

Ede4ka [16]

Answer:

you didnt put anything

Explanation:

7 0

3 years ago

Read 2 more answers

Una cámara fotográfica analógica (no digital) tiene dos lentes intercambiables. Uno de foco 55mm y el otro de 200 mm. Toma una f

Sergeu [11.5K]

Answer:

f = 55mm, h ’= -9.89 cm

f = 200 mm, h ’= 42.5 cm

Explanation:

For this exercise let's start by finding the distance to the image, using the equation of the constructor

$\frac{1}{f} = \frac{1}{p} + \frac{1}{q}$

where f is the focal length, p and q are the distances to the object and image, respectively

lens with f₁ = 55mm = 0.55cm

$\frac{1}{q} = \frac{1}{f} - \frac{1}{p}$

$\frac{1}{q_1}$ = $\frac{1}{0.55} - \frac{1}{10}$

$\frac{1}{q_1}$ = 1.718

q₁ = 0.582 m

lens with f₂ = 200mm = 2m

$\frac{1}{q_2}$ = $\frac{1}{2} - \frac{1}{10}$

$\frac{1}{q_2}$ = 0.4

q₂ = 2.5 m

the magnification of a lens is given by

m = $\frac{h'}{h} = - \frac{q}{p}$

h ’= $- \frac{q}{p} \ h$

let's calculate for each lens

f = 55mm

h '= - 0.582 / 10 1.7

h ’= 0.0989 m

h ’= -9.89 cm

f = 200 mm

h '= - 2.5 / 10 1.7

h ’= -0.425 m

h ’= 42.5 cm

The negative sign indicates that the image is real and inverted

4 0

3 years ago

A building is being knocked down with a wrecking ball, which is a big metal sphere that swings on a 15-m-long cable. You are (un

Charra [1.4K]

Answer:

1.9 s

Explanation:

We are given that

Length of cable=l=15 m

We have to find the time you have to move out of the way.

We know that

Time period,T= $2\pi\sqrt{\frac{l}{g}}$

Where g= $9.8m/s^2$

By using the formula

$T=2\pi\sqrt{\frac{15}{9.8}}$

$T=2\times 3.14\times \sqrt{\frac{15}{9.8}}=7.77 s$

Time you have to move out

$t=\frac{T}{4}=\frac{7.77}{4}=1.9 s$

Hence,time you have to move out of the way=7.77 s

6 0

4 years ago

Which renewable resource produces the most electricity in the United States? geothermal energy solar energy wind power hydroelec

Anna71 [15]

Hydroelectricity is the best answer.

This is an article by the EIA, but the pie graph is the most helpful: https://www.eia.gov/energyexplained/?page=us_energy_home

8 0

3 years ago

Read 2 more answers

Contrast situations where work is done with different amounts of force to situations where no work is done such as standing stil

uranmaximum [27]

Picking up a sheet of paper . . . work done with small force
Picking up a glass of water . . . work done with moderate force
Picking up a huge boulder . . . work done with a great tremendous force
=================================
Standing still . . .
Holding your tongue out as far as it will go . . .
Holding your arm over your head for 3 days . . .
Holding a huge boulder motionless over your head . . .
Pushing on a brick wall . . .
Pushing as hard as you can against a truck with the wheels locked . . .
. . . . . No work done at all, because the force doesn't move through a distance.

<u>Work done = (force) times (distance)</u>

If the force doesn't move, then the distance is zero, and the work done is zero.

5 0

3 years ago