PHYSICS HIGH SCHOOL

Determine the change in velocity of a car that starts at rest and has a final velocity of 20m/s north

Answers

Answer 1
Answer:

The change in velocity of a car that starts at rest and has a final velocity of 20 meters/second north would be 20 meters/second.

What is acceleration?

The rate of change of the velocity with respect to time is known as the acceleration of the object. Generally, the unit of acceleration is considered as meter/seconds².

As given in the problem we have to find the  change in velocity of a car that starts at rest and has a final velocity of 20m/s north,

the final velocity of the car = 20 meters/second north

Change in the velocity = final velocity - initial velocity

                                      =20 - 0

                                      = 20 meter/second

Thus, the change in the velocity would be 20 meters/second

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Answer 2
Answer: Im not too sure if I just dont understand but if something starts at rest, its not moving so Vi would be 0m/s and if the final velocity would be 20m/s North. Than the change would be 20m/s, its not asking for displacment so you don't need direction. I got my answer from doing Change in Velocity = Final velocity - Initial velocity

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If a photon has a frequency of 1.15 x 10 to the 15 power Hertz what is the energy of the photon given: Planck's constant is 6.63 x 10 to the negative 34 joule seconds
A current carrying wire wrapped around an iron ore is called a
It takes 56.5 kilojoules of energy to raise the temperature of 150 milliliters of water from 5°C to 95°C. If youuse an electric water heater that is 60% efficient, how many kilojoules of electrical energy will the heater actually use by the time the water reaches its final temperature?
Earth's gravity acts upon objects with a steady force of __________.a. 8.9 meters per secondb. 9.8 meters per minutec. 8.9 meters per minute squaredd. 9.8 meters per second squared
If you were standing at the center of curvature in front of a concave mirror, what image would be projected?A. The image would be upside down, would look as tall as you, and would be at the same distance from the mirror as you are. B.The image would be upright, would look shorter than you, and would be closer to the mirror than you are. C.The image would be upside down, would look shorter than you, and would be closer to the mirror than you are. D.The image would be upright, would look as tall you, and would be at the same distance from the mirror as you are.

The _____ theory is the most accepted theory regarding the origin of the solar system. It suggests that our star, the Sun, was first created by a cloud of dust and gas.

Answers

The Nebular Hypothesis is the most accepted explanation of the origin of our solar system. It states that the Sun was formed by a massive cloud of dust and gas light-years across, and it was bigger than the actual sun itself. Most of the mass in the center formed the sun, and the rest expanded outward.

A. Nebular is the answer

When describing a maritime polar air mass, you might say it formed over _____ and is _____.

Answers

The correct answer for the question that is being presented above is this one: "an air mass that formed over land. it is cold and dry." When describing a maritime polar air mass, you might say it formed over land and is cold and dry. It's temperature can range from around freezing to near 20 degrees Celsius

Answer:

water, cold and moist

Explanation:

I just did a test on it and got it wrong using land, cold and dry and got it right using this anwer

Which of the following is an example of heat transfer through radiation?A. A pot of soup warming on a hot burner.

B. A crayon melting on a hot sidewalk.

C. Beach sand getting warmed by the sun.

D. An egg getting cooked in a pot of boiling water.

Answers


A). The hot burner is in contact wit the pot,
warming it with conduction.

B).  The hot sidewalk is in contact with the crayon,
melting it with conduction.

C).  The sun is not in contact with anything, and there is
no fluid to convect between it and the sand.  The only way
for the sun to transfer heat to the sand is with radiation.

D).  The boiling water is in contact with the egg,
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No two electrons can have the same four quantum numbers is known as the

Answers

Answer:

  • Pauli's exclusion principle

Explanation:

You can read this principle in any chemistry or physics textbook that deals with quantum numbers. It states that two electrons of an atom cannot have the same set of four quantum numbers.

As result:

  • Any orbital can have a maximum of two electrons, and

  • Two electrons in a same orbital have opposite spins: one will have +1/2 and the other will have -1/2.

Remember, that the quantum numbers are the numbers that identify the electrons in an atom.

  • n is the principal quantum number, and can have positive integer vaules: 1, 2, 3, 4, 5, 6, 7, ...

  • ℓ is the Azimuthal or angular momentum quantum number. It can have integer values from 0 to n -1: 0, 1, 2, 3, 4, ...

  • mℓ is the magnetic quantum number, which can have values from -ℓ to + ℓ

  • ms is the spin quantum number. which can have values +1/2 and -1/2.

In this way, Pauli's exclusion principle implies that two electrons occupying the same orbital will have equal n, ℓ, and mℓ values, meaning that their ms will be opposite: + 1/2 and −1/2.

Final answer:

The rule that no two electrons can possess the same four quantum numbers is known as the Pauli Exclusion Principle. Proposed by Wolfgang Pauli, this rule dictates that no two electrons can be in the same state within an atom. It limits the number of electrons in atomic shells and subshells, influencing the structure of atoms.

Explanation:

The rule that no two electrons can have the same four quantum numbers is known as the Pauli Exclusion Principle. These quantum numbers include: principal quantum number (n), orbital angular quantum number (l), magnetic quantum number (m), and spin quantum number (ms).

An Austrian physicist, Wolfgang Pauli, proposed this rule in 1925. This principle means that two electrons can share the same orbital if only their spin quantum numbers have different values. Since the spin quantum number can only take two values: +½ or -½, a maximum of only two electrons can occupy the same orbital. As a result, any atomic orbital can be populated by zero, one, or two electrons only.

This principle is important because it limits the number of electrons in atomic shells and subshells, and thus plays a crucial role in determining the structure of atoms and the characteristics of the elements on the periodic table.

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How many grams is 5kg of tap water?

Answers

When you write "5 kg", the little 'k' in the middle stands for 1,000.
So '5 kg' means '5,000 g'.

It doesn't matter what substance you're working with.  It could be
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If you start skating down this hill, your potential energy will be converted to kinetic energy. At the bottom of the hill, your kinetic energy will be equal to your potential energy at the top. What will be your speed at the bottom of the hill?

Answers

Your potential energy at the top of the hill was (mass) x (gravity) x (height) .

Your kinetic energy at the bottom of the hill is (1/2) x (mass) x (speed)² .

If there was no loss of energy on the way down, then your kinetic energy
at the bottom will be equal to your potential energy at the top.

(1/2) x (mass) x (speed)² = (mass) x (gravity) x (height)

Divide each side by 'mass' :

(1/2) x (speed)² = (gravity) x (height) . . . The answer we get
will be the same for every skater, fat or skinny, heavy or light.
The skater's mass doesn't appear in the equation any more.

Multiply each side by 2 :

(speed)² = 2 x (gravity) x (height)

Take the square root of each side:

Speed at the bottom = square root of(2 x gravity x height of the hill)

We could go one step further, since we know the acceleration of gravity on Earth:

Speed at the bottom = 4.43 x square root of (height of the hill)

This is interesting, because it says that a hill twice as high won't give you
twice the speed at the bottom.  The final speed is only proportional to the
square root of the height, so in order to double your speed, you need to
find a hill that's 4 times as high.
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