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3 years ago

How many quantum numbers are needed to describe the energy state of an electron in an atom?

1 answer:

8 0

There are a total of four<span> quantum numbers needed:

1) The principal quantum number (n),
2) The orbital angular momentum quantum number (l),
3) The magnetic quantum number (m</span>l),
4) The electron spin quantum number (ms)

Hope this helps!

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The temperature of a sample of silver increased by 24.0 °C when 269 J of heat was applied. What is the mass of the sample?

statuscvo [17]

Answer:

Mass of the silver will be equal to 46.70 gram

Explanation:

We have given heat required to raise the temperature of silver by 24°C is 269 J , so $\Delta T=24^{\circ}C$

Specific heat of silver = 0.240 J/gram°C

We have to find the mass of silver

We know that heat required is given by

$Q=mc\Delta T$ , here m is mass, c is specific heat of silver and $\Delta T$ is rise in temperature

So $269=m\times 0.240\times 24$

m = 46.70 gram

So mass of the silver will be equal to 46.70 gram

3 0

3 years ago

Suppose a ball is dropped from some height and 2 seconds later another ball is dropped.

QveST [7]

Answer:

It will never pass, because things fall at the same time, if there are no outside fource or other different like shape, gravity…

8 0

3 years ago

If velocity is 0.2m/s, what is the kinetic energy?

Natalija [7]

$\huge\boxed{♧ \: \mathfrak{ \underline{Answer} \: ♧}}$

we know,

$\boxed{kinetic \: \: energy = \frac{1}{2} m {v}^{2} }$

So,

$\longmapsto \dfrac{1}{2} \times 10 \times 0.2 \times 0.2$

$\longmapsto0.2 \: joules$

3 0

3 years ago

Clearly distinguish between mass, weight, and volume.

USPshnik [31]

The mass tells you the amount of matter or substance that makes up an object.

The weight tells you the measure of the matter.

The volume tells you the amount of space/size taken up

6 0

4 years ago

Which of these would have the most kinetic energy?

kow [346]

Answer:

A stormy ocean, having the most kinetic energy means it moves more and faster

6 0

3 years ago