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3 years ago

State some important uses of magnet

2 answers:

4 0

Magnets are used in magnetic compass, doorbells, refrigerators. Magnets are used in dynamos, motors, loudspeakers, microphones etc. Ceramic magnets are used in computers. Magnets are used in toys to give a magic effect.

GarryVolchara [31]3 years ago

3 0

Use of magnet:

Magnets are used in magnetic compass, doorbells, refrigerators.
Magnets are used in dynamos, motors, loudspeakers, microphones etc.
Ceramic magnets are used in computers.
Magnets are used in toys to give a magic effect.

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A steel block has a volume of 0.08 m³ and a density of 7,840 kg/m³. What is the force of gravity acting on the block (the weight

Alex17521 [72]

Force of gravity =mass*graviational acceleration
gravitational acceleration=g=9.81
mass=Density*Volume=.08*7840
force of gravity= .08*7840*9.81
gg

5 0

3 years ago

Alex_Xolod [135]

Answer:

The work done on the sled by friction, W = - 4593.75 J

Explanation:

Given data,

The combined mass of sled and the boy, m = 75 kg

The displacement of the boy, S = 25 m

The coefficient of the friction, u = 0.25

The frictional force acting on the boy,

Where,

η - is the normal force acting on the boy (mg)

Substituting the values,

F = 0.25 x 75 x 9.8

= 183.75 N

Since the direction of the frictional force is against the direction of motion

F = - 183.75 N

The work done on the sled by friction,

W = F x S

= - 183.75 x 25

= - 4593.75 J

Hence, the work done on the sled by friction, W = - 4593.75 J

5 0

3 years ago

A mass of gas has a volume of 4m3, a temperature of 290k, and an absolute pressure of 475 kpa. When the gas is allowed to expand

dsp73

P1v1/t1 = p2v2/t2
p1=475, v1=4, t1=290
v2=6.5, t2=277
solve for p2 in kpa

5 0

3 years ago

The way all jobs in modern society are connnected to other jobs is called

Contact [7]

The fact that all jobs in modern society are connected to other jobs is called division of labor.

<h3>What is division of labor?</h3>

We know that work is structured in such a way that jobs are connected. The jobs are split into smaller components and each person only does a small fragment of the that work that is to be done in a give case.

The fact that all jobs in modern society are connected to other jobs is called division of labor.

Learn more about division of labor:brainly.com/question/24691008

#SPJ1

6 0

2 years ago

A student makes a short electromagnet by winding 580 turns of wire around a wooden cylinder of diameter d = 2.1 cm. The coil is

Mashutka [201]

Answer:

1.02453 Am²

0.36834 m

Explanation:

N = Number of turns = 580

d = Diameter = 2.1 cm

r = Radius = $\frac{d}{2}=1.05\ cm$

A = Area = $\pi r^2$

I = Current = 5.1 A

B = Magnetic field = 4.1 μT

x = Distance

$\mu_0$ = Vacuum permeability = $4\pi \times 10^{-7}\ H/m$

Magnetic dipole moment is given by

$\mu=NIA\\\Rightarrow \mu=580\times 5.1\times \pi\times 0.0105^2\\\Rightarrow \mu=1.02453\ Am^2$

The magnitude of the magnetic dipole moment of this device is 1.02453 Am²

Magnetic field is given by

$B=\frac{\mu_0NIA}{2\pi x^3}\\\Rightarrow x=\left(\frac{\mu_0NIA}{2\pi B}\right)^{\frac{1}{3}}\\\Rightarrow x=\left(\frac{4\pi\times 10^{-7}\times 580\times 5.1\times \pi\times 0.0105^2}{2\pi 4.1\times 10^{-6}}\right)^{\frac{1}{3}}\\\Rightarrow x=0.36834\ m$

The axial distance is 0.36834 m

7 0

3 years ago

State some important uses of magnet​

State some important uses of magnet