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3 years ago

8

How much heat is required to raise the temperature of 5kg of iron from 50°c to250°c

1 answer:

Marianna [84]3 years ago

4 0

Answer:

462000J

Explanation:

Quantity of heat= mass x specific heat capacity of iron x change in temp

specific heat capacity of iron is 462J/Kg/K

change in temp = 250-50= 200°C

200°C is equivalent to 200K since 1°C is 1K

Q= mct

= 5x462x200

= 462000J

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What is also known as watered carbons

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Earth turns on its axis about once every 24 hours. The Earth's equatorial radius is 6.38 x 106 m. If some catastrophe caused Ear

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To solve this problem it is necessary to apply the concepts related to the Period of a body and the relationship between angular velocity and linear velocity.

The angular velocity as a function of the period is described as

$\omega = \frac{2\pi}{T}$

Where,

$\omega =$ Angular velocity

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At the same time the relationship between Angular velocity and linear velocity is described by the equation.

$v = \omega r$

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We also know that the radius of the earth (r) is approximately

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$\omega = 7.272*10^{-5}rad/s$

Then the linear velocity would be,

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The speed would Earth's inhabitants who live at the equator go flying off Earth's surface is 463.96

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3 years ago

What must the charge (sign and magnitude) of a 1.65 gg particle be for it to remain balanced against gravity when placed in a do

balandron [24]

Answer:

Charge, $q=2.52\times 10^{-5}\ C$ and it is negative.

Explanation:

Given that,

Mass of the charge, $m=1.65\ g=1.65\times 10^{-3}\ kg$

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Charge

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The electric force and the force of gravity are balanced in the electric field. It is given by :

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$q=\dfrac{mg}{E}$

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$q=2.52\times 10^{-5}\ C$

Since, the electric field is in downward direction. The force must be upward direction s that the charge is negative.

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3 years ago

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kati45 [8]

Explanation:

<u>Given</u><u>.</u> <u>Required</u><u> </u>

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3 years ago

A coil 3.85 cm radius, containing 450 turns, is placed in a uniform magnetic field that varies with time according to B=( 1.20×1

Nimfa-mama [501]

Answer:

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