A freely suspended bar magnet always shows north and south direction why

Answers

Answer 1

Answer:

The earth behaves as a magnetic dipole. Therefore a freely suspended magnet always points towards in the north-south direction because the north pole of the suspended magnet attracts the south pole of the earth's magnet which is the geographical north pole of the earth.

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Answer 2

Answer:

Answer:

Because the north pole of a compass needle points towards geographical N and S poles and the compass needle points towards georaphical south.

Explanation:

Earth is a huge magnet.

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When light bends as it enters a different medium the process is known as what?

The image formed by a convex spherical mirror will always bea. inverted and larger than the object.
b. upright and larger than the object.
c. inverted and smaller than the object.
d. upright and smaller than the object.

Answers

a. inverted and larger than the object.

A mirror is used to see your own reflection. Earlier in the days, people would use a still water to see their reflection. It is basically used for grooming. Spherical mirrors have been used by earlier mathematicians and physicist to conduct experiments related to geometry.

Penn Foster STudents: d. upright and smaller than the object.

Suppose you built a scale-model atom in which the nucleus is the size of a tennis ball. About how far would the cloud of electrons extend?

Answers

Answer:

500 m

Explanation:

The size of a nucleus is about

$d=10^(-15) m$

Instead, the size of the electron cloud extends at the order of

$D=10^(-10)m$

This means that the ratio between the size of the electron cloud and the size of the nucleus is about

$k=(D)/(d)=10,000$

So, the electron cloud is about 10,000 bigger than the nucleus of the atom.

Here we want to build a scale-model atom, in which the nucleus is the size of a tennis ball, so a size of approximately

$d=5 cm$

Therefore, since the proportions must be respected, the electron clouds must be 10,000 bigger, so its size in this model would be:

$D=kd=(10,000)(5)=50,000 cm = 500 m$

So, the size of the electron cloud would be 500 m.

Final answer:

The cloud of electrons in a scale-model atom would extend about 100 meters.

Explanation:

The nucleus is a central, positively charged region within an atom. It contains protons, which have a positive electric charge, and neutrons, which are electrically neutral. Nuclei make up the majority of an atom's mass and are held together by the strong nuclear force, while electrons orbit the nucleus in electron shells.

In a scale-model atom where the nucleus is the size of a tennis ball, the cloud of electrons would extend about 100 meters. This can be calculated by comparing the size of the nucleus to the actual size of an atom. The diameter of a tennis ball is approximately 6.7 cm, while the diameter of an atom is on the order of 0.1 nm. By scaling up, we find that the electron cloud would extend around 100 meters.

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Material speed of lightspace 3 x 108 m/s
water 2.25 x 108 m/s
glass 2 x 108 m/s
air 3 x 108 m/s

Light moves from air into a new material. The greatest refraction would occur when light passes through which material?
A) air
B) glass
C) water
D) It would refract the same amount in each material.

Answers

The question is poor. Light doesn't refract on its way THROUGH anything. It refracts at the boundary BETWEEN two different media. The effect is greatest where the ratio of the speeds of light in the two media is greatest. On your list, that would be at the boundary between air or space and glass.

Answer: I think the answer is B glass.

Explanation: Because Glass is light.

An electric fence displays a warning sign about voltage and amperage of the fence. How would amperage and voltage affect the power of the fence?

Answers

Yes it is true that electrical fences displays a warning about voltage and amperage of the fence. It has to be first understood that power is directly proportional to voltage as well as current. So higher the voltage or higher the current flowing through the fenses, higher will be the power. So any person touching the fence should always be aware of the voltage and current flowing through the fence, otherwise it can be very deadly. Sometimes it can be seen that a high voltage is being passed through the fence and the current passed is comparitively low. This will not decrease the total power flowing through the fence.

Which of the following is a chemical property of a mineral?A Hardness
B Luster
C Atomic structure
D Color

Answers

Hardness, color , and luster.

But since you can pick one, I would say hardness

Final answer:

The chemical property of a mineral is its atomic structure, which influences its chemical behavior.

Explanation:

The correct answer is C Atomic structure. A chemical property of a mineral refers to the behavior of a mineral when it undergoes a chemical change or reaction.

Atomic structure is a chemical property because it determines the way in which the atoms of a mineral are arranged and bonded together, which influences its overall chemical behavior.

For example, the atomic structure of a mineral can determine its reactivity with acids or its ability to conduct electricity.The chemical property of a mineral could be derived from its atomic structure.

The atomic structure, which includes the number of protons, neutrons, and electrons in an atom of the element, determines the behavior of the element in a chemical reaction. Hardness, luster, and color are considered physical properties of the mineral, not chemical. Example, quartz (a common mineral) has a specific atomic structure that makes it react to acid differently than a mineral like calcite.

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Within the metric system all units are based on the number?

Answers

The metric system is based upon powers of ten (10), which is convenient because: A measurement in the metric system that is represented by a rational number remains a rational number after metric unit conversion.

Answer:

Explanation:

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