All categories

4 years ago

You have a magnet that you can turn on and off with a switch. What type of magnetism are you using?

Physics

2 answers:

julia-pushkina [17]4 years ago

6 0

B. Electromagnetism

ivolga24 [154]4 years ago

4 0

Answer:

Like the other guy said, the answer is electromagnetism

Explanation:

You might be interested in

What is one way you can state how you feel?

dexar [7]

Words and more words

7 0

3 years ago

A solid sphere of radius R is made of an insulating material. It holds a charge, Q, which is distributed evenly throughout the s

Vinvika [58]

Answer:

The magnitude of Electric Field is $E=\dfrac{Qr}{4\pi \epsilon_0 R^3}$

Explanation:

Given:

Radius of the solid sphere=R
Total charge of the sphere=Q

Let consider a Gaussian surface at a distance of r such that 0<r>R in the shape of sphere such that the electric Field due to this E and it is radially outwards.

The charge inside this Gaussian surface volume we have , $q_{in}=\dfrac{Qr^3}{R^3}$

Now using Gauss Law we have

$E\times4\pi r^2=\dfrac{q_{in}}{\epsilon_0}\\E\times4\pi r^2=\dfrac{\dfrac{Qr^3}{R^3}}{\epsilon_0}\\E=\dfrac{Qr}{4\pi \epsilon_0 R^3}$

5 0

3 years ago

Britain and France signed an entente and became the

V125BC [204]

Allied Forces. they became the allies.

6 0

4 years ago

Read 2 more answers

Rank the angular speed of the following objects, from highest to lowest:- A bowling ball of radius 12.3 cm rotating at 8.21 radi

dlinn [17]

Answer:

A bowling ball (8.21rad/s) > A tire (7.94rad/s) > A square (7.75rad/s) > A rock (6.98rad/s) > A top spinning (6.54rad/s)

Explanation:

To rank the angular speed (ω) of the objects, we need first calculate its value for every object:

A bowling ball of radius 12.3cm rotating at 8.21 radians per second:

ω = 8.21 rad/s

A tire of radius 0.321m rotating at 75.8 rpm:

$\omega = 75.8 \frac{rev}{min}\cdot \frac{2\pi rad}{1rev}\cdot \frac{1min}{60s} = 7.94rad/s$

A 6.84cm diameter top spinning at 375 degrees per second:

$\omega = 375 \frac{^\circ}{s}\cdot \frac{2\pi rad}{360^ \circ} = 6.54rad/s$

A square with sides (b) 0.458m long, whose corners are moving with tangential speed (v) 2.51 m/s as it rotates about its center:

$\omega = \frac{v}{r} = \frac{v}{\frac{b}{2}\sqrt 2} = \frac{2.51 m/s}{\frac{0.458 m}{2} \sqrt 2} = 7.75rad/s$

A rock on a string, being swung in a circle of radius 0.521 m with a centripetal acceleration (a) of 25.4 m/s²:

$\omega = \sqrt \frac{a}{r} = \sqrt \frac{25.4 m/s^{2}}{0.521m} = 6.98rad/s$

Now, the rank of the angular speed of the objects, from highest to lowest is:

A bowling ball (8.21rad/s) > A tire (7.94rad/s) > A square (7.75rad/s) > A rock (6.98rad/s) > A top spinning (6.54rad/s)

I hope it helps you!

4 0

3 years ago

A metal sphere is neutral because it has an equal number of protons and electrons. Draw how the charges in the sphere are redist

Anika [276]

Answer:

https://www.google.com/search?q=A+metal+sphere+is+neutral+because+it+has+an+equal+number+of+protons+and+electrons.+Draw+how+the+charges+in+the+sphere+are+redistributed+when+a+negatively+charged+rod+is+brought+near+it.&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiixouw2IDiAhUIbawKHaYzBaMQ_AUIDigB&biw=1455&bih=688#imgrc=3YSBhnGs0Hz80M:

go here

6 0

3 years ago

Read 2 more answers