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3 years ago

12

Thermal energy would naturally flow between objects at which temperatures?

1 answer:

marissa [1.9K]3 years ago

4 0

Answer:

i think the answer is letter C. From 35°c to 45°c

Explanation:

sorry if it is wrong

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A kilogram weighs (at the earth's surface, e.g., the grocery store) approximately:

stira [4]

D. 2.2 pounds would be the answer

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3 years ago

Why does the lithium atom develop a positive charge?

Anuta_ua [19.1K]

Answer:

A lithium atom has 3 protons and 3 electrons. It can lose one of its electrons, making it an ion. It now has more positive protons than electrons so it has an overall positive charge. Therefore it is a positive ion.

Explanation:

Lithium, an alkali metal with three electrons, is also an exception to the octet rule. Lithium tends to lose one electron to take on the electron configuration of the nearest noble gas, helium, leaving it with two valence electrons.

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2 years ago

An upward force acts on a proton as it moves with a speed of 2.0 × 105 meters/second through a magnetic field of 8.5 × 10-2 tesl

mel-nik [20]

Explanation :

It is given that,

Speed of the proton, $v=2\times 10^{5}\ m/s$

Magnetic field, $B=8.5\times 10^{-2}\ T$

Magnetic force is given by :

$F=q(v\times B)$

q is the charge of proton, $q=1.6\times 10^{-19}\ C$

So,

$F=1.6\times 10^{-19}\ C\times 2\times 10^{5}\ m/s\times 8.5\times 10^{-2}\ T$

$F=2.72\times 10^{-15}\ N$

The direction of force is given by using right hand rule. So, the force will act in upward direction.

Hence, the correct option is (a) " $2.72\times 10^{-15}\ N$ to the north".

3 0

3 years ago

Read 2 more answers

What are the products of photosynthesis?

gtnhenbr [62]

Answer:

Glucose also called(Energy)

4 0

4 years ago

What mass of cu(s)cu(s) is electroplated by running 14. 5 aa of current through a cu2 (aq)cu2 (aq) solution for 4. 00 hh?

galina1969 [7]

The mass of Copper electroplated is 68.76 g

<h3>What is electroplating?</h3>

The process of plating a metal onto another is known as electroplating.

It is often used to prevent corrosion of metal or for the decorative purposes

In this process, electric current is passed through an aqueous solution containing dissolved cations.

The dissolved cations are reduced developing a thin metal coating on the electrode.

At cathode,

$Cu^{2+}(aq) + 2e^-\rightarrow Cu(s)$

Current, I = 14.5 A

Time, t = 4 hrs = 4×60×60 = 14400 sec

Charge, q = It = 14.5×14400= 208800 C

Copper metal deposited by 2×96487 C = 63.55 g

Copper metal deposited by 208800 C = $\frac{63.55 \times208800}{2\times96487}$

= 68.76g

Hence, The mass of Copper electroplated is 68.76 g

Learn more about electroplating:

brainly.com/question/22104403

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4 0

1 year ago

Read 2 more answers