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2 years ago

Method to separate the . sand+iron fillings

Physics

2 answers:

KengaRu [80]2 years ago

7 0

Answer:

by using a magnetic field

valkas [14]2 years ago

3 0

Use a magnet to attract the iron fillings from the sand!

Hope this helps!

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Explanation:

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4 years ago

A battery of voltage V delivers power P to a resistor of resistance R connected to it. By what factor will the power delivered t

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Answer:

Explanation:

Power P = V² / R

a ) The resistance is changed to 2.90R

Power will become 1 / 2.9 times .

b )The voltage of the battery is now 2.90V, but the resistance is R

P = (2.9V)² / R

= 8.41 x V² / R

So power becomes 8.41 times

c )The resistance is 2.90R and voltage is 2.90V

Power P = (2.9V)² / 2.9 R

= 2.9 V²/R

So power becomes 2.9 times

d ) The resistance is 2.90R and the voltage is V/2.90

Power P = ( V/2.90)² x 1 / 2.90R

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3 years ago

A sphere of radius r = 5cm carries a uniform volume charge density rho = 400 nC/m^3. Q. What is the total charge Q of the sphere

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Given that,

Radius = 5 cm

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Using formula of charge

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Where, $\rho$ = charge density

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Put the value into the formula

$q=\rho\times(\dfrac{4}{3}\pi r^3)$

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$q=\dfrac{4}{3}\times\pi\times400\times10^{-9}\times(5\times10^{-2})^3$

$q=2.094\times10^{-10}\ C$

Hence, The total charge Q of the sphere is $2.094\times10^{-10}\ C$ .

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3 years ago

One 10.0 Ω resistor is wired in series with two 10.0 Ω resistors in parallel. A 45.0 V battery supplies power to the circuit. Wh

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3 years ago

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Method to separate the . sand+iron fillings​

Method to separate the . sand+iron fillings