PHYSICS HIGH SCHOOL

Which of the following families contains elements that will not form compounds?

Answers

Answer 1

Answer:

The answer is:

noble gases will not form compounds.

The explanation:

-The noble gas family, all of the elements in Group Zero.

-The list of noble gases include helium(He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).

- these elements don't like to react, we don't use them because of they have 8 valence electrons already and don't like to lose or gain electrons so, they will not form compounds.

Answer 2

Answer: Noble gases because they have 8 valence electrons already

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A pendulum has a period of 0.3 second. What is its frequency?

Answers

Frequency= 1/T T=Period T=0.3 Frequency = 3.33 repeating. Hz

Choose the correct description, of what happens to the electron speeds in a more massive white dwarf. Choose the correct description, of what happens to the electron speeds in a more massive white dwarf. As the mass of a white dwarf increases, the pressure must increase to resist gravity. To do this, the electrons must move faster. As the mass of a white dwarf increases, the pressure must decrease to resist gravity. To do this, the electrons must move faster. As the mass of a white dwarf increases, the pressure must decrease to resist gravity. To do this, the electrons must move slower. As the mass of a white dwarf increases, the pressure must increase to resist gravity. To do this, the electrons must move slower.

Answers

Answer:

As the mass of a white dwarf increases, the pressure must increase to resist gravity. To do this, the electrons must move faster.

Explanation:

A white dwarf also known as degenerate dwarf is a star or an electron degenerate matter and is as massive as the Sun but only about as large in size as planet Earth.

The maximum mass of a white dwarf is about 1.4 times the mass of the Sun.

Also, as the mass of a white dwarf increases, the pressure must increase to resist gravity and to do this, the electrons must move faster.

A hair dryer uses 72,000 joules of energy in 60 seconds what is the power of this hair dryer

Answers

Use work/time ratio.

72,000 joules /60.0 seconds = 1,200 W.

What is the largest speed this projectile can have without causing the cable to break?

Answers

What projectile ?
What cable ?

What is the persistent fear of snow falling

Answers

Chionophobia is the extreme dislike or fear of snow.

The word originates from Greek 'chion' meaning snow and 'phobos'
meaning fear, aversion or dread. People with Chionophobia often
understand that their fear is unfounded and weird. However, they
are unable to control it.

Another contributor was the first to answer the question correctly, and in fact,
I learned the answer from that earlier post. If I could only remember who it was,
I would give them a big shout-out. Their answer was deleted by a moderator
because it didn't have an explanation with it.

What is the average speed of a cheetah that runs 70m in 2.5 seconds?

Answers

$70m\ in\ 2.5\ seconds\n V=(s)/(t)\n V=(70m)/(2.5s)\n V=28(m)/(s)$

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