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3 years ago

Can a magnet attract a pure substance?

Physics

1 answer:

Salsk061 [2.6K]3 years ago

3 0

Answer:

Magnets strongly attract materials which already themselves have magnetic domains. They do not significantly attract many metals like gold, aluminum, silver, and even some types of high-chromium stainless-steel, which lack such domains. In fact, pure gold is slightly repelled.

Explanation:

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What are three physical of aluminum foil

shusha [124]

Solid, ductile, and malleable. Ductile means it can conduct heat. Malleable means it can be shaped differently.

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3 years ago

A raindrop falls to the ground from a rain cloud at an altitude of 3000 meters.

shutvik [7]

Assuming the raindrop was stationary relative to the vertical distance to the ground at the start:

D=0.5at where d is distance, a is acceleration and t is time

D is 300 meters

a is 9.8 meter/sec squared

Solve for t in seconds

t = 61.2 seconds

v=at where v is velocity

a is 9.8 meters per second squared

t is 61.2 seconds

solve for v

v = 600 meters per second.

If it had an initial vertical velocity (v0) at the start :

d= 0.5at+v0t

and

v=at+v0

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3 years ago

A series LR circuit consists of a 2.0-H inductor with negligible internal resistance, a 100-ohm resistor, an open switch, and a

VMariaS [17]

Answer:

The maximum power delivered by the power supply is 0.81 W.

Explanation:

Given that,

Inductance L= 2.0 H

Resistance R = 100 ohm

Voltage = 9.0 V

We need to calculate the power

Using formula of power

$P = \dfrac{V^2}{R}$

Where, P = power

V = voltage

R = resistance

Put the value into the formula

$P = \dfrac{(9.0)^2}{100}$

$P =0.81\ W$

Hence, The maximum power delivered by the power supply is 0.81 W.

7 0

3 years ago

Consult Multiple-Concept Example 5 for insight into solving this problem. A skier slides horizontally along the snow for a dista

antoniya [11.8K]

The initial velocity of the skier is 4.5 m/s

Explanation:

There is only one force acting on the skier in the horizontal direction, and it is the force of friction, whose magnitude is

$F_f = -\mu_k mg$

where

$\mu_k = 0.050$ is the coefficient of kinetic friction

m is the mass of the skier

$g=9.8 m/s^2$ is the acceleration of gravity

The negative sign is due to the fact that the direction of the force of friction is opposite to the direction of motion of the skier.

According to Newton's second law, the net force acting on the skier is equal to the product between his mass and his acceleration, so we can write:

$F=ma\\ \rightarrow -\mu_k mg = ma$

So, the acceleration of the skier is

$a=-\mu_k g$

Now we can apply the following suvat equation to find the initial velocity of the skier:

$v^2-u^2=2as$

where

v = 0 is the final velocity (he comes to a stop)

u is the initial velocity

s = 21 m is the displacement

a is the acceleration

Substituting the equation for the acceleration and solving for u, we find

$u=\sqrt{v^2-2as}=\sqrt{-2(-\mu_k g) s}=\sqrt{2(0.050)(9.8)(21)}=4.5 m/s$

Learn more about accelerated motion here:

brainly.com/question/9527152

brainly.com/question/11181826

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brainly.com/question/2562700

#LearnwithBrainly

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3 years ago

Students were asked to design a lab that would illustrate a concept that

g100num [7]

Answer:

<em>I</em><em> </em>think that the answer would be D.Given the diagram if you just see you will find that a lamp is projected in such a way that its light falls on the ice cubes so the ice would get a large magnitude of heat energy so the kinetic energy of the molecules increases and at a constant temperature(0°c) they would melt and gets transformed into tiny water doplets as we know if the light is continuous enabled on water droplets then at a certain time it would change into water vapours as we know that if any liquid gets evaporated up then it will only evaporate when it absorbs heat from its surrounding as doing so the surrounding along with glass box would get cool down and so the water vapours on air would also cool down and get condensed on outer glass box particles and if the glass box is porous in nature then the water droplets would fill the box

Hope it helps

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3 years ago