# A branch of mechanics dealing with the mathematical methods of describing motion Kinematics Time Mass

Answer: Kinematics is the branch of Physics that deals with
the mathematical methods of describing motion.

## Related Questions

H2O consists of polar molecules. CO2 consists of nonpolar molecules. How do chemists explain this difference? a CO2 does not have polar bonds.

b These compounds have different shapes.

c Oxygen has a different attraction for electrons in H2O than in CO2

C. Oxygen has a different attraction for electrons in H2O than in CO2

the covalent bond between Hydrogen-Oxygen and Carbon-Oxygen is different because the difference of electronegativity (the tendency of an atom to attract a shared pair of electrons towards itself) between Hydrogen and Oxygen is a lot higher than the difference of electronegativity between Carbon and Oxygen. This difference in electronegativity results in separation of partial electric charge creating polar bonds and giving the molecule a polarity.

These compounds have different shapes.

Explanation:

Two things determine whether a molecule is polar or no polar. The size and shape of the molecule.

Which is a correct example of the principle of conservation of momentum? A) reversing of a car at a dead end B) conversion of radio waves to sound C) deforming of a balloon on being burst D) bouncing of a basketball off the board

A correct example of the principle of conservation of momentum is the bouncing of a basketball off the board. Therefore, option D is correct.

What is momentum ?

As momentum depends on both velocity and the direction of the body's motion, it is quantified by "mass velocity". Since velocity is a vector and mass is a scalar, momentum is a vector quantity. Mass times speed equals momentum.

"The motion of an item equal to the product of its mass and its velocity" is referred to as momentum. When something is said to have momentum, it refers to its unique mass and direction of motion.

Here, we offer a few more ideas that will help us describe motion in the future. Before Newton, the French scientist and philosopher Descartes introduced the first of them, called momentum.

Thus, option D is correct.

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Which is a correct example of the principle of conservation of momentum?

D) bouncing of a basketball off the board

Why can't there be a number lower than absolute zero

motion of molecules in gases.

You know that the temperature we feel with our skin is the result of the
average speed of all the tiny molecules zipping around or vibrating in
the solid, liquid, or gas.

The faster they're all moving, the warmer the substance feels to us.
The slower they're all moving, the cooler the substance feels to us.

When molecules slow down to zero and lose all of their kinetic energy,
that temperature is what we call 'absolute zero' ... if they're not moving
at all, then they can't move any slower.

Temperature lower than absolute zero is not possible. Lower than absolute zero a gas contain negative pressure and volume which is not possible. temperature is the energy created by moving atoms absoulte zero is a complete stand still you can make particles move to the end of the universe but the coldest temperature will be stuck at the point where atoms are motionless

The earth takes 1 year to revolve around the sun at 1 A.U. distance (an astronomical unit = 93,000,000 miles). If a planet were 4 A.U. from the sun, how many years would it take to make 1 orbit?

Kepler's third law states that the square of the orbital period is proportional to the cube of the semi-major axis of its orbit. In equation form, P^2 / a^3 = constant. For the earth, (1 y)^2 / (1 AU)^3 = 1, so the constant is 1. For a planet 4 AU from the sun:
P^2 / (4 AU)^3 = 1P^2 = 64P = 8 years

Will the sun ever burn out

Explanation: The Sun like all other stars will eventually go through nuclear fusion. But for a very long time (about 5 billion years) When it does it is more than likely that it will consume the earth as the sun will expand very larger during the process and become a red giant.

Proton with an initial speed of 800000 m/s is brought to rest by an electric field. Part A- Did the proton move into a region of higher potential or lower potential?

Part B - What was the potential difference that stopped the proton?
ΔU = ________V

Part C - What was the initial kinetic energy of the proton, in electron volts?
Ki =_________eV

The proton which is moving at the initial speed and brought to rest by an electric field is,

• Part A- The proton move into a region of higher potential.
• Part B - The potential difference that stopped the proton is 3339 V.
• Part C - The initial kinetic energy of the proton, in electron volts is 3339 eV.

What is proton?

Proton is the elementary part of the atom, having the positive charge of C.  Proton is found in the nucleus of the atom.

The initial speed of the proton is 800000 m/s and the mass of the proton is . The proton is brought to rest by an electric field.

• Part A- The proton move into a region of higher potential or lower potential- The proton is elementary part of the atom, having the positive charge. Now the force required to brought this proton to rest by electric field must be opposite of it. If the proton is moving towards highers, then it can be bought at rest by the electric field which always go from higher to lower potential. Thus, the proton move into a region of higher potential.

• Part B - The potential difference that stopped the proton-

The initial speed of the proton is 800000 m/s and the mass of the proton is .

As, the potential difference that stopped the proton is equal to the kinetic energy of the proton per unit charge of one proton. Thus potential difference is,

Thus, the potential difference that stopped the proton is 3339 V.

• Part C - The initial kinetic energy of the proton, in electron volts-

By the conservation of energy, the kinetic energy of the element is equal to the potential difference. Thus, the initial kinetic energy of the proton, in electron volts is 3339 eV.

Thus, the proton which is moving at the initial speed and brought to rest by an electric field is,

• Part A- The proton move into a region of higher potential.
• Part B - The potential difference that stopped the proton is 3339 V.
• Part C - The initial kinetic energy of the proton, in electron volts is 3339 eV.

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A) Into a region of higher potential

Explanation:

Let's remind that:

- Like charges repel each other

- Unlike charges attract each other

Here we have a proton, which is a positive charge, which is brought to rest by an electric field. This means that the electric field has slowed down the proton: so, the force exerted by the electric field on the proton was opposite to the direction of motion of the proton. But the lines of an electric field go from points at higher potential to points at lower potential - this means that the proton was actually moving towards a point at higher potential. (for example, it was moving towards another positive charge source of the field, so the potential increases as the proton approaches the source charge).

B) 3,338 V

The initial kinetic energy of the proton is given by:

where

is the proton mass

is the initial speed

Substituting,

When the proton is brought to rest, all this energy is converted into electric potential energy, given by

where

is the proton charge

is the potential difference

Since , we can solve to find the potential difference:

C) 3,338 eV

We already found the initial kinetic energy of the proton in part B), and it is given by

Now we want to convert it into electron volts; keeping in mind the conversion factor between eV and Joules,

we find:

Select the phrases that correctly describe density. Select one or more: a. Density is a physical property. b. Density determines if a substance floats or sinks. c. Density may have units of liters (L). d. Density relates a mass to its volume. e. Density varies with temperature.

Options (A), (B), (D), and (E).

Explanation:

Density is a physical property that describes the relationship between mass and volume. This property shows whether an object will float or it will get sink. The density of substances changes with the changing temperature, as both are inversely proportional to each other.

Mathematically, density can be written as,

Density =

ρ =     ,      Where, ρ = density, m = mass, v = volume

Thus, the correct answers are options (A), (B), (D), and (E).

Several​​ light​​bulbs ​​connected​​ to ​​a ​​circuit ​​in​​ one​​ loop​​ is​​ called​​ a​​___________. A. Parallel ​​circuit B.Basic ​​circuit
C.Series ​​circuit
D.Multiple​​ circuit