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3 years ago

The number of neutrons in an atom is determined by which if the following means?

2 answers:

5 0

The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus..

MARK BRAINIEST PLEASE!!!

iren2701 [21]3 years ago

4 0

Answer:

The NUMBER OF PROTONs

Explanation:

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The following three questions refer to a situation in which a driver is in a car that crashes into a solid wall. The car comes t

Andreas93 [3]

Answer:

1) p₀ = 45000 N / s , p₀ '= 1800 , b) I = -45000 N s , I = 1800 Ns

Explanation:

Impulse equals the change in momentum

I = Δp

1) the initial moment of the car

p₀ = M v

p₀ = 1500 30

p₀ = 45000 N / s

the change at the moment is

Δp = 45000

because the end the car is stopped

moment of the person

P₀ ’= m v

p₀ '= 60 30

p₀ '= 1800

D₀ '= 1800

2) of the momentum change impulse ratio

car

I = Δp

I = -45000 N s

person

I = Δpo '

I = 1800 Ns

3) the object that give the momentum to stop the wall motoring

The person is stopped by the impulse given by the car

a) This area is the one that absorbs most of the vehicle impulse

be) If using a safety painter, the time during which the greater force will act, therefore the lessons decrease

c) The air bag helps reduction in the speed of the person relatively quickly.

6 0

4 years ago

Please help! Just fill in the blanks! *100 pts (even tho it says 50 they take half, trust me) and I will mark brainliest! I will

Alona [7]

Explanation:

here's the answer, shouldn't be too hard to get the rest now!

4. f

5. t

6. t

7. t

8. f

9. t

10. f

7 0

2 years ago

A proton moves through a region containing a uniform electric field given by E with arrow = 54.0 ĵ V/m and a uniform magnetic fi

madreJ [45]

Answer:

acceleration is 9.58 × $10^{7}$ (- 14 ĵ + 51 k ) m/s

Explanation:

given data

uniform electric field E = 54.0 ĵ V/m

uniform magnetic field B = (0.200 î + 0.300 ĵ + 0.400 k) T

velocity v = 170 î m/s.

to find out

acceleration

solution

we know magnetic force for proton is

i.e = e (velocity × uniform magnetic field)

magnetic force = e (170 î × (0.200 î + 0.300 ĵ + 0.400 k) )

magnetic force = e (- 68 ĵ + 51 k ) ..................1

and now for electric force for proton i.e

= uniform electric field × e ĵ

electric force = e (54 ĵ ) ............2

so net force will be add magnetic force + electric force

from equation 1 and 2

e (- 68 ĵ + 51 k ) + e (54 ĵ )

e (- 14 ĵ + 51 k )

so the acceleration (a) for proton will be

net force = mass × acceleration

a = e (- 14 ĵ + 51 k ) / 1.6 $10^{-19}$ / 1.67 × $10^{-27}$

acceleration = 9.58 × $10^{7}$ (- 14 ĵ + 51 k ) m/s

7 0

3 years ago

If you wanted to know how much the temperature of a particular piece of material would rise when a known amount of heat was adde

mars1129 [50]

Answer:

Option (b) is correct.

Explanation:

The amount of heat required to raise the temperature of substance of mass 1 kg by 1 degree C, is called specific heat of the substance.

The formula of the specific heat is

H = m c (T' - T)

where, m is the mass, c is the specific heat and T' - T is the change in temperature.

So, to know the rise in temperature, by adding the known amount of heat, the specific heat is required.

So, option (b) is correct.

4 0

3 years ago

A typical protostar may be several thousand times more luminous than the sun. what is the source of this energy?

padilas [110]

The source of this energy is from the release of gravitational energy as the protostar continues to shrink.

<h3>How are stars born and what is a protostar?</h3>

Nebulae have as possible differences in gas and dust. Some factors, such as turbulence, can cause one of them to contract. This contraction of the set of materials causes the elaboration and execution of this phase of materials, generating what is usually called, in this protostar.

A protostar is formed by the contraction of a giant molecular cloud in the interstellar medium. Stars form within relatively dense concentrations of interstellar gas and dust known as molecular clouds.

See more about protostar at brainly.com/question/14317247

#SPJ4

6 0

1 year ago