PHYSICS HIGH SCHOOL

What do you mean by average velocity​

Answers

Answer 1
Answer:

Answer:

Here is the answer. Hope this helps you!

Explanation:

Average velocity is the sum of initial and final velocity divided by 2. I t is the same as total Displacement divided by total time. Average velocity is calculated when the body is in non-uniform motion (also when total displacement and time is not given). The formula is as follows:

u + v/2 = v_(av)

Average velocity = Average speed

during motion in a straight line. therefore, the above mentioned formula can be used for calculating average speed as well, when the direction is one and only the same, that is, during motion in a straight line. The S.I unit remains the same-

m/s.

Since velocity is vector, average VELOCITY is also vector. However, Average SPEED is scalar as speed is scalar. both can be equal only when the distance = displacement and when they are following the same direction of motion.

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If an object moves 28 feet every 16 seconds and 7 feet every 4 seconds, what is the object's speed?
A bartender slides a beer mug at 1.7 m/s towards a customer at the end of a frictionless bar that is 1.0 m tall. The customer makes a grab for the mug and misses, and the mug sails off the end of the bar. (a) How far away from the end of the bar does the mug hit the floor? m (b) What are the speed and direction of the mug at impact?
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To find the number of neutrons in an atom, you would subtractA.) mass number from atomic number
B.) atomic number from mass number
C.) atomic number from electron number
D.) isotope number from atomic number

Answers

To find the number of neutrons in an atom, what we must do is to follow the following steps:

1) Find the element in the periodic table.

2) Find the atomic number of the element. The atomic number is the number of protons of a single atom of that element.

3) Find the atomic weight of the element.

4) Finally, we look for the number of neutrons. For this, we follow the following relationship:

Atomic weight - number of protons = number of neutrons.

Answer:

To find the number of neutrons in an atom, you would subtract:

B.) atomic number from mass number

Option B is the correct answer, because the number of neutron is equal to the difference between the mass number and atomic number.

Further explain:

Before going about the calculation of the number of neutron in an atom, firstly we will know something about an atom.

An atom is a fundamental unit of matter. It is composed of nucleus and electrons orbiting around the nucleus.

The electrons in an atom are orbiting around the nucleus in the shells of different energies.

Maximum part of the mass of an atom is concentrated in its nucleus and it is composed of proton and neutron. They are also known as nucleons of an atom.

Proton and electron are the charge particles. Proton carries the positive charge while electron carries the negative charge of same amount, but neutron does not carry any type of charge so it is neutral.

The total number of electron is equal to the total number of proton is an atom.

That’s why atoms are neutral in nature.

Atomic number: The total number of electron or total number of proton in an atom is known as the atomic number.

{A_n}=P

   

Here, {A_n}  is the atomic number and P  is the number of proton.

Atomic mass: The sum of number of proton and neutron in an atom is known as atomic mass or mass number.

So, atomic mass can be calculated as,

\boxed{M = P + N}

   

Here, M  is the atomic mass or mass number and  N is the number of neutron .

So, number of neutron can be calculated as,

\boxed{N = M - P}

   

So, number of neutron is equal to the difference between the mass number and number of proton or atomic number.

Learn more:

1. Water is a compound: brainly.com/question/4636675.

2. Acceleration of the box against the friction: brainly.com/question/7031524.

3. Example of energy brainly.com/question/1062501.

Answer detail:

Grade: High school

Subject: Chemistry

Chapter: Atom

Keyword:

Number of neutron, mass number, proton, electron, atomic number, atom, nucleus, difference, atomic mass, subtraction, orbit, neutral.

I need help i'm confused

Answers

Net force is the two added since they are in the same direction. Net force equals 5N<--
Direction is to the left

The magnetic north pole changes location but the geographic north pole does not true or false

Answers

The North Magnetic Pole is the point on the surface of Earth's Northern Hemisphere at which the planet's magnetic field points vertically downwards (in other words, if a magnetic compass needle is allowed to rotate about a horizontal axis, it will point straight down). There is only one location where this occurs, near (but distinct from) the Geographic North Pole and the Geomagnetic North Pole. So yes true

The planet Pluto has 1/500 the mass and 1/15 the radius of Earth. What is the value of g on the surface of Pluto?(A) 0.3 m/s2
(B) 1.6 m/s2
(C) 2.4 m/s2
(D) 4.5 m/s2
(E) 7.1 m/s2

Answers

c 2.4 m/s² is the answer 

A ball of mass 2 kg is kept on the hill of height 3 km. Calculate the potential energy possessed by it ?How can I get the potential energy ?

Answers

We know that -

P.E=m*g*h

Where,

m = mass

g = acceleration due to gravity

h=height

First we convert height into meters.

1 km = 1000 meters

3 km = 1000 * 3 meters = 3000 meters

So, putting the values in the above formula, and by taking 'g' = 9.8 m/s², we get-

P.E.= 2*3000*9.8

P.E.= 58800 Joules

P.E.= 58.8 kJ
Sairah's work is correct as far as it goes.  The potential energy of the ball
relative to the bottom of the hill is 58,800 Joules.

To address the second part of the question:
In order to get ahold of that energy, the ball must be returned to the bottom
of the hill. The most efficient way would be to drop it, so that it wouldn't have to
scrape along the grass on the way down. But that can only work if there's a sheer
cliff on one side of the hill. Otherwise, you just have to roll it down, and accept the
fact that it loses some of its energy to friction on the way.

However the ball gets to the bottom, the energy it has left shows up in the form
of kinetic energy, and 58,800 joules is a lot of kinetic energy.  If somehow the ball
could arrive at the bottom with ALL the energy it had at the top, it would be moving
at something like 540 miles per hour !

What do multimillion-dollar sponsorships of famous athletes symbolize? a)globalization b)leadership
c)commercialization
d)sportsmanship

Answers

These sponsorships are somehow related to globalisation, as they are a global phenomenon, but some of them are on a very local scale, so  globalisation is not a necessary part in them.

The best answer is c) commercialisation - atheletic competitions are turned into sources of profit, and athletes compete with the thought of winning money through it and the companies hope to increase their revenue by advertising during the sports events

Answer:

The answer for Plato is C.
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