PHYSICS HIGH SCHOOL

Magnetic fields are produced by particles that are(1) moving and charged
(2) moving and neutral
(3) stationary and charged
(4) stationary and neutral

Answers

Answer 1
Answer: Magnetic fields are produced by particles that are moving and charged.
Answer 2
Answer:

Answer:

the correct answer is 1 moving and charged.

Explanation:

Magnetic fields are produced by moving electric charges. Everything is made up of atoms, and each atom has a nucleus made of neutrons and protons with electrons that orbit around the nucleus.

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The alpha particles leave visible tracks in the cloud chamber becauseIonization by the alpha particle seeds the formation of clouds where the particle has passed.
The kinetic energy of the alpha particles heats the air.
The alpha particle is so energetic that it leaves a smoke trail behind.
The alpha particle strikes nitrogen molecules and breaks them into atomic nitrogen.

Answers

Answer: Ionization  by the alpha particle seeds the formation of clouds where the particle has passed.

The inner atmosphere of a cloud chamber is composed of an easily ionizable gas, this means that little energy is required to extract an electron from an atom. This gas is maintained in the supercooling state, so that a minimum disturbance is enough to condense it in the same way as the water is frozen.  

Then, when a charged particle with enough energy interacts with this gas, it ionizes it.  

This is how alpha particles are able to ionize some atoms of the gas contained inside the chamber when they cross the cloud chamber.

These ionized atoms increase the surface tension of the gas around it allowing it to immediately congregate and condense, making it easily distinguishable inside the chamber like a small cloud. In this way, it is perfectly observable the path the individual particles have traveled, simply by observing the cloud traces left in the condensed gas.  

A person 4ft tall casts a shadow 10ft long. at the same time, a nearby tree casts a shadow 23 ft long. find the height of the tree

Answers

9 feet and some inches

A constant net force acts on an object. which of the following best describes the object's motion?

Answers

The object is moving with a decreasing acceleration. The object is moving with a constant velocity.

A boy is running with kinetic energy of 810j if the boy has a mass of 80kg what is his peed

Answers

KE=(1/2)mv²  ⇒ v=√(2KE/m)

Data:
KE=kenetic energy=810 J
m=mass=80 Kg
v=velocity (speed)

v=√(2KE/m)
v=√(2*810 J/80 Kg)=4.5 m/s.

answer: his speed is 4.5 m/s.

A person drops a brick from the top of a building. The height of the building is 400 m and the mass of the brick is 2.00 kg. What will be the speed of the brick right before it touches the ground? Use g=10.0 m/s^2.

Answers

This question involves the conservation of energy. There are two energy in this case, potential energy and kinetic energy. Let's divid the energy into three status. 
1. Before dropping, all potential energy 
2.dropping, potential energy transformed to kinetic energy
3. before hitting the ground, all Kinetic energy.

Recall the formula for both energy, which are U=mgh, and K=1/2mv^2

Since the energy is conserved in this case ( b/c otherwise it will say in the problem), the amount of energy at the beginning should equal to the energy at the end. Therefore we have, mgh=1/2mv^2

plug the number in and solve for velocity.

2x400x10=1/2 x 2 x v^2
v^2=8000
v=√(8000)
v=40√(5)

What is the most common state of matter in the universe

Answers

Answer:

Plasma

Explanation:

Plasmais the most common because plasma is a gas that has been energized to the point that some of the electrons break
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