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3 years ago

Magnets use ---- to attract to some objects

Physics

2 answers:

drek231 [11]3 years ago

8 0

Answer:

magnets are used to attract metal objects.

Explanation:

RideAnS [48]3 years ago

7 0

Answer:

magnets use electrical attraction to attract to some objects aka they use magnetic fields or just fields

plz vote fairly

Explanation:

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To lift a load of 100 kg a distance of 1 m an effort of 25 kg must be applied over an inclined plane of length 4 m. What must be

andreyandreev [35.5K]

Work = force * distance.
We must produce twice as much energy as we are lifting the weight twice as high.
But we are not increasing the force so we must increase the length of the ramp ( distance ) instead.
The new length will be twice as great as the previous length.
So 8 metres is required.

25 kg * 8 m = work = 100 kg * 2 m

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3 years ago

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3 years ago

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Which is the property of mattter in which substance can transfer heat to electricity

vodomira [7]

Conductivity is the property of matter in which a substance can transfer heat or electricity.

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Matter : Anything which occupies space and has mass is called matter.

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Impure Substances ( mixture )

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Solid

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6 0

3 years ago

Copper has a modulus of elasticity of 110 GPa. A specimen of copper having a rectangular cross section 15.2 mm × 19.1 mm is pull

bearhunter [10]

Answer:

$strain = 1.4 \times 10^{-3}$

Explanation:

As we know by the formula of elasticity that

$E = \frac{stress}{strain}$

now we have

$E = 110 GPA$

$E = 110 \times 10^9 Pa$

Area = 15.2 mm x 19.1 mm

$A = 290.3 \times 10^{-6}$

now we also know that force is given as

$F = 44500 N$

here we have

stress = Force / Area

$stress = \frac{44500}{290.3 \times 10^{-6}}$

$stress = 1.53 \times 10^8 N/m^2$

now from above formula we have

$strain = \frac{stress}{E}$

$strain = \frac{1.53 \times 10^8}{110 \times 10^9}$

$strain = 1.4 \times 10^{-3}$

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3 years ago

An electron and a proton have charges of an equal magnitude but opposite sign of 1.60 10-19 C. If the electron and proton in a h

MA_775_DIABLO [31]

The proton's electrostatic force exerted on the electron will be 3.5×10¹² N.

<h3>What is the electrostatic force?</h3>

It is a force imposed by one charge on another as a result of the field.

The electrostatic force produced by one line charge on another line charge separated by r is determined by the charge potency of each charge as well as the separation distance between them.

The electrostatic force is found as:

$\rm F= \frac{Kq_1q_2}{R^2} \\\\ F= \frac{9 \times 10^ 9 \times 1.6 \times 10^{-19} \times -1.6 \times 10^{-19} }{(2.00\times 10^{-11})^2} \\\\\ F= 3.5 \times 10^{12} \ N$

Hence, the proton's electrostatic force exerted on the electron will be 3.5×10¹² N.

To learn more about the electrostatic force refer to the link;

brainly.com/question/9774180

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8 0

2 years ago