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2 years ago

Which statement best describes an atom?

Physics

2 answers:

Komok [63]2 years ago

6 0

<h3><u>Answer;</u></h3>

a group of protons and neutrons that are surrounded by electrons

<h3><u>Explanation;</u></h3>

<em><u>An atom is the smallest particle of an element that can take part in a chemical reaction.</u></em> Atoms of the same element are similar, while different elements have different atoms.
<em><u>Atom of an element is made up of sub atomic particles, namely; protons, neutrons, and electrons. The nucleus of the atoms contains the protons and the neutrons, while the energy shells surrounding the nucleus contains the electrons.</u></em>
The protons are positively charged , while the neutrons have no charge, which makes the nucleus positively charged. The electrons are negatively charged.

SpyIntel [72]2 years ago

5 0

The correct answer is going to be <span>C, because in the nucleus of an atom there are protons and electrons; which can't move, and are surrounded by electrons on the electrical cloud</span>

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A. Between planet A and planet B i believe is the correct answer

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2 years ago

When looking at the Impulse of an object during a collision, we often use "average force"? When an object hits something, is the

polet [3.4K]

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2 years ago

Unless indicated otherwise, assume the speed of sound in air to be v = 344 m/s. A stationary police car emits a sound of frequen

bixtya [17]

Answer:

a) The velocity of the car is 7.02 m/s and the car is approaching to the police car as the frequency of the police car is increasing.

b) The frequency is 1404.08 Hz

Explanation:

If the police car is a stationary source, the frequency is:

$f_{a} =(\frac{v+v_{c} }{v} )f_{s}$ (eq. 1)

fs = frequency of police car = 1200 Hz

fa = frequency of moving car as listener

v = speed of sound of air

vc = speed of moving car

If the police car is a stationary observer, the frequency is:

$f_{L} =f_{a} (\frac{v}{v-v_{c} } )=(\frac{v+v_{c} }{v-v_{c} } )f_{s}$ (eq. 2)

Now,

fL = frequecy police car receives

fs = frequency police car as observer

a) The velocity of car is from eq. 2:

$1250=1200(\frac{v+v_{c} }{v-v_{c} } )\\1250(v-v_{c} )=1200(v+v_{c} )\\v_{c} =\frac{50*344}{2450} =7.02m/s$

b) Substitute eq. 1 in eq. 2:

$f_{L} =(\frac{v+v_{p} }{v-v_{c} } )(\frac{v+v_{c} }{v-v_{p} } )f_{s} =(\frac{344+20}{344-7.02} )(\frac{344+7.02}{344-20} )*1200=1404.08Hz$

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2 years ago

What conditions would have to exist in order for a space station to support life

amid [387]

Answer:

Mechanical life support system

Explanation:

Mechanical life support system is one which allows humans to survive on places or conditions which are not natural to their survival so by the help of mechanical devices humans can survive in places like underwater or in space.

The life support system may not only provide water, air and food but it should also keep a proper check on the maintenance of body pressure, temperature, management of the waste product and the absorption or the radiations from the body itself.

Thus mechanical life support system are designed with the hep of high engineering techniques for the safety and security as these are life-critical.

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2 years ago

What happens when you dip open bottle in bucket full of water?why?<br>chapter=pressure

Degger [83]

Answer: It goes inside filling most of it .

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2 years ago