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3 years ago

A _____ is a gas-like state of matter made of positive ions, free electrons, and neutral particles. Example: Sun or Neon lights

Physics

2 answers:

kotegsom [21]3 years ago

7 0

Plasma seems to fit here the best. It is known as the fourth state of matter, extremely hot.

saveliy_v [14]3 years ago

5 0

The correct answer is plasma.

When the temperature of a gas is very high, as it is, in extremely hot objects such as stars such as Sun,or incandescent or discharge lamps such as Neon lights, the gas exists in an ionized state.

At high temperatures, electrons gain enough energy to escape the attractive forces of the nucleus. When the electrons leave the atom, the atom becomes positively charged and these charged atoms are called ions.

At high temperatures, the matter can also contain neutrons which are neutral particles and are the constituents of the nucleus.

Thus the state at which matter can exist as ions, electrons, protons or neutrons is called plasma.

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ohaa [14]

Answer:

a = 1.1 10⁵ m / s²

Explanation:

This is a momentum exercise, where we use the relationship between momentum and momentum

I = ∫ F dt = Δp

= p_f - p₀

as they indicate that the ball bounces at the same height, we can assume that the moment when it reaches the ground is equal to the moment when it bounces, but in the opposite direction

F t = 2 (m v)

therefore the average force is

F = 2 m v / t

where in general the mass of the ball unknown, the velocity of the ball can be calculated using the conservation of energy

starting point. Done the ball is released with zero initial velocity

Em₀ = U = mgh

final point. Upon reaching the ground, just before the deformation begins

Em_f = K = ½ m v²

energy is conserved in this system

Em₀ = Em_f

m g h = ½ m v²

v = √ (2gh)

This is the velocity of the body when it reaches the ground, so the force remains

F = 2m √(2gh) /t

where the height of the person's chest is known and the time that the impact with the floor lasts must be estimated in general is of the order of milli seconds

knowing this force let's use Newton's second law

F = m a

a = F / m

a = 2 √(2gh) / t

We can estimate the order of magnitude of this acceleration, assuming the person's chest height of h = 1.5 m and a collision time of t = 1 10⁻³ s

a = 2 √ (2 9.8 1.5) / 10⁻³

a = 1.1 10⁵ m / s²

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3 years ago

The bottom of cooking utensils are often kept black. Give reason

stepan [7]

Answer:

absorb more heat and get heated quickly

Explanation:

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3 years ago

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A student drops two metallic objects into a 120-g steel container holding 150 g of water at 25°C. One object is a 206-g cube of

spayn [35]

Answer:

Mass of the aluminium chunk = 278.51 g

Explanation:

For an isolated system as given the energy lost and gains in the system will be zero therefore sum of all transfer of energy will be zero,as the temperature will also remain same

A specific heat formula is given as

Energy Change = Mass of liquid x Specific Heat Capacity x Change in temperature

Q = m×c×ΔT

Heat gain by aluminium + heat lost by copper = 0 (1)

For Aluminium:

Q = $m\times0.897\frac{J}{g.k}\times(25-5)$