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3 years ago

If an element has a charge of 2+, how many more protons does it have than electrons?

Physics

2 answers:

yulyashka [42]3 years ago

6 0

If an element has a charge of 2+, It has 2 more proton than electrons

Shtirlitz [24]3 years ago

5 0

Answer:

Explanation:

If a body loses some electrons, it becomes positively charged.

Here element having charge + 2 unit, it means the two electrons are removed from the element.

As we know that the atom is electrically neutral, it means the number of protons is equal to the number of neutrons.

So, if two electrons are removed, it means the now, the number of protons are two more than the number of electrons.

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A car starts with an initial speed of 12 m/s and accelerates at 3 m/s/s for 5 seconds

Nostrana [21]

Explanation:

Vi = 12 m/s

a = 3 m/s^2

t = 2 s

Vf = Vi + a × t = 12 + 3 ×2 = 18 m/s

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3 years ago

Read the sentence form the section "Heavy Weights Can Be Trouble for Teens." Other schools that use the program are leery of the

raketka [301]

The correct answer would be C. Unaware because it is the opposite of leery

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3 years ago

Which of the following statements concerning the nuclear force is false? O The nuclear force is attractive and not repulsive. O

Ulleksa [173]

Answer:

The nuclear force is attractive and not repulsive.
The nuclear force is very weak and much smaller in relative magnitude than the electrostatic and gravitational forces.

Explanation:

Nuclear force is the strongest existing force in the nature.

It has the shortest range.

Its main function is to hold the subatomic particles together in nature.

The nuclear force is created by the exchange of pi mesons between the nucleons of an atom, but for this exchange to happen the particles must be close to one another of the order of few femtometer.

At about 1 femtometer the nuclear force is very strongly attractive in nature but at distance greater than 2.5 femtometer it fades away.

The force becomes repulsive in nature at distance less than 0.7 femtometer.
This force holds the likely charged protons together in the nucleus.

3 0

3 years ago

A 1200 kg car traveling at 60 mph quickly brakes to a halt. The kinetic energy of the car is converted to thermal energy of the

ololo11 [35]

Answer:

ΔT = 59.9 ° C

Explanation:

For this exercise the brake energy is totally converted into heat

Let's calculate the vehicle energy

K = ½ m v²

Let's reduce the units to the SI system

v = 30 mph (1609.34 m / mile) (1h / 3600s) = 13.41 m / s

Em = K = ½ 1200 13.41²

K = 1.079 105 J

All this energy is transformed into heat

Em = Q

The expression for heat is

Q = m $c_{e}$ ΔT

ΔT = Q / m $c_{e}$

The specific heat of iron is $c_{e}$ = 450 J / Kg ºC

ΔT = 1,079 105 / (4.0 450)

ΔT = 59.9 ° C

8 0

4 years ago

Read 2 more answers

A particle is attached to a spring and is pushed so that the spring is compressed more and more. As a result, the spring exerts

ad-work [718]

In order for particles to perform a simple harmonic motion, we must follow the law of force of the form F = -kx, where x is the displacement of the object from the equilibrium position and k is the spring constant. The force shown in F = -kx is always the restoring force in the sense that the particles are pulled towards the equilibrium position.

The repulsive force felt when the charge q1 is pushed into another charge q2 of the same polarity is given by Coulomb's law
F = k *q1* q2 / r^2.
It is clear that Coulomb's law is an inverse-square relationship. It does not have the same mathematical form as the equation F = -kx. Thus, charged particles pushed towards another fixed charged particle of the same fixed polarity do not show a simple harmonic motion when released. Coulomb's law does not describe restoring force. When q1 is released, it just fly away from q2 and never returns.

5 0

4 years ago