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4 years ago

4. What information does the atomic number of an element give us?

Physics

1 answer:

bulgar [2K]4 years ago

5 0

Answer: It gives us the identity of the element as well as the number of protons.

Explanation:

Because the number of protons is specific for each element, we can determine what element we are looking at just by the atomic number. For example the element with the atomic number of 1 is Hydrogen, atomic number of 2 is Helium, atomic number of 3 is Lithium and so forth.

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A helicopter (m = 3250 kg) is cruising at a speed of 56.9 m/s atan altitude of 185 m. What is the total mechanical energy of the

taurus [48]

Answer:

The mechanical energy of the helicopter is $1.12\times 10^7\ J$ .

Explanation:

It is given that,

Mass of the helicopter, m = 3250 kg

Speed of the helicopter, v = 56.9 m/s

Position of the helicopter, h = 185 m

The energy possessed by an object due to its motion is called its kinetic energy. It is given by :

$E=\dfrac{1}{2}mv^2$

$E=\dfrac{1}{2}\times 3250\times (56.9)^2$

$E=5.26\times 10^6\ J$

The energy possessed by an object due to its position is called its potential energy. It is given by :

$E=mgh$

$E=3250\times 9.8\times 185$

$E=5.89\times 10^6\ J$

The sum of kinetic and potential energy is called mechanical energy of the system. It is given by :

$M=5.26\times 10^6+5.89\times 10^6$

$M=11.15\times 10^6\ J$

$M=1.12\times 10^7\ J$

So, the mechanical energy of the helicopter is $1.12\times 10^7\ J$ . Hence, this is the required solution.

6 0

4 years ago

What is "the cloud"?

Sedaia [141]

Answer:

Cloud is a condensed from of atmospheric moisture consisting of small water droplets.

Clouds cause rainfall and snow fall.

Different types of clouds are found in the atmosphere. Some main types of them are cirrus, cumulus, nimbus, and stratus. Most clouds are generated by the cooling of air as it rises.

6 0

3 years ago

Read 2 more answers

If the amplitude of a sound increases, which statement is true?

Aleksandr-060686 [28]

What are the options?

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4 years ago

One advantage of a fever is that it can slow down the

AlexFokin [52]

One advantage of a fever is that it can slow down the growth of pathogens by denaturing their proteins.

8 0

4 years ago

Define measurement What problems might me face it measurement systems were not established? (1+2=3)

kvasek [131]

Answer:

The process of comparing unknown quantities with known quantities is called measurement .

If it measurement system were not established ,then there may create lots of problem such as: unequal measure ,anyone can get more ,or anyone can get less mass ,so on .

6 0

3 years ago