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1 year ago

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When objects of two different temperature are in contact, what happens?

2 answers:

Sonja [21]1 year ago

5 0

Answer: C. the warmer object transfers heat energy to the cooler side

brilliants [131]1 year ago

3 0

Answer:

opción C

Explanation:

hope it helps youu

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Why does water appear blue?

ICE Princess25 [194]

B.
Because if you were to be in a room with orange lights the water would appear orange and glowing. Same thing with other colors this is because the sun rays pass through the atmosphere reflecting from a pure white light to a lighter blue and reflecting off of the waters surface.

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2 years ago

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Each iron atom has a mass of about 9 × 10–23 grams. Even a small grain of iron has an incredible number of atoms in it—about 1 x

Tema [17]

Answer:

Explanation:

Each iron atom has a mass of about 9 x 1023 grams. Even a small grain of iron has an incredible number of atoms in. it--about 1 x 1018 atoms in one grain. ...

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2 years ago

How much energy is released by the decay of 3 grams of 230Th in the following reaction 230 Th - 226Ra + "He (230 Th = 229.9837 g

Serhud [2]

<u>Answer:</u> The energy released for the decay of 3 grams of 230-Thorium is $2.728\times 10^{-15}J$

<u>Explanation:</u>

First we have to calculate the mass defect $(\Delta m)$ .

The equation for the alpha decay of thorium nucleus follows:

$_{90}^{230}\textrm{Th}\rightarrow _{88}^{226}\textrm{Ra}+_2^{4}\textrm{He}$

To calculate the mass defect, we use the equation:

Mass defect = Sum of mass of product - Sum of mass of reactant

$\Delta m=(m_{Ra}+m_{He})-(m_{Th})$

$\Delta m=(225.9771+4.008)-(229.9837)=1.4\times 10^{-3}amu=2.324\times 10^{-30}kg$

(Conversion factor: $1amu=1.66\times 10^{-27}kg$ )

To calculate the energy released, we use Einstein equation, which is:

$E=\Delta mc^2$

$E=(2.324\times 10^{-30}kg)\times (3\times 10^8m/s)^2$

$E=2.0916\times 10^{-13}J$

The energy released for 230 grams of decay of thorium is $2.0916\times 10^{-13}J$

We need to calculate the energy released for the decay of 3 grams of thorium. By applying unitary method, we get:

As, 230 grams of Th release energy of = $2.0916\times 10^{-13}J$

Then, 3 grams of Th will release energy of = $\frac{2.0916\times 10^{-13}}{230}\times 3=2.728\times 10^{-15}J$

Hence, the energy released for the decay of 3 grams of 230-Thorium is $2.728\times 10^{-15}J$

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2 years ago

What is halogens?....

ddd [48]

<u>Any of five chemical substances that are not metals and that combine with hydrogen to form strong acid compounds from which simple salts can be made</u>

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2 years ago

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ch4aika [34]

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A long uniformly charged wire has charge density λ=0.16μλ=0.16μC/m.

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3 years ago