1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Julli [10]
3 years ago
7

Which of the following best describes a completely elastic collision?

Physics
1 answer:
IRISSAK [1]3 years ago
3 0
The kinetic energy before equals K after
You might be interested in
A scientist’s curiosity is a legitimate driving force of scientific endeavor
igomit [66]
True . Your statement is correct
5 0
3 years ago
Why is mercury not suitable as the liquid in the U-tube? (the relationship between density of the liquid and the pressure in the
adoni [48]
Mercury Is more suitable than water cause it is denser than water.

Relation between density and pressure

Pressure = force/area

Replace force by mass * acceleration
Pressure = mass * acceleration/ area

We can replace mass by density * volume since density = mass/ volume
Pressure = density * volume * acceleration/ area

Volume is length^3 whereas area is length ^2. So volume / area = length

Pressure = density * length * acceleration

Gravity is form of acceleration so

Pressure = density * length * gravity
Length can be height or depth

Finally pressure = density * height * gravity

P = ρ g h => pressure of liquid
8 0
3 years ago
Which type of star is smaller neutron or dwarf
Ulleksa [173]
White dwarfs<span> are formed from the collapse of low mass </span>stars<span>, less than about 10 time the mass of the Sun. This </span>star<span> loses most of its mass in a wind, leaving behind a core that is less than 1.44 solar mass. On the other hand,</span>neutron stars<span> are formed in the catastrophic collapse of the core of a massive </span>star.
5 0
3 years ago
An electron is released from rest on the axis of a uniform positively charged ring, 0.200 m from the ring's center. If the linea
melisa1 [442]

Answer:

Velocity of the electron at the centre of the ring, v=1.37\times10^7\ \rm m/s

Explanation:

<u>Given:</u>

  • Linear charge density of the ring=0.1\ \rm \mu C/m
  • Radius of the ring R=0.2 m
  • Distance of point from the centre of the ring=x=0.2 m

Total charge of the ring

Q=0.1\times2\pi R\\Q=0.1\times2\pi 0.4\\Q=0.251\ \rm \mu C

Potential due the ring at a distance x from the centre of the rings is given by

V=\dfrac{kQ}{\sqrt{(R^2+x^2)}}\\

The potential difference when the electron moves from x=0.2 m to the centre of the ring is given by

\Delta V=\dfrac{kQ}{R}-\dfrac{kQ}{\sqrt{(R^2+x^2)}}\\\Delta V={9\times10^9\times0.251\times10^{-6}} \left( \dfrac{1}{0.4}-\dfrac{1}{\sqrt{(0.4^2+0.2^2)}} \right )\\\Delta V=5.12\times10^2\ \rm V

Let\Delta U be the change in potential Energy given by

\Delta U=e\times \Delta V\\\Delta U=1.67\times10^{-19}\times5.12\times10^{2}\\\Delta U=8.55\times10^{-17}\ \rm J

Change in Potential Energy of the electron will be equal to the change in kinetic Energy of the electron

\Delta U=\dfrac{mv^2}{2}\\8.55\times10^{-17}=\dfrac{9.1\times10^{-31}v^2}{2}\\v=1.37\times10^7\ \rm m/s

So the electron will be moving with v=1.37\times10^7\ \rm m/s

5 0
3 years ago
The derived unit for density are g/cm3.<br><br> True<br> False
anzhelika [568]
True, the measurement shown is a derived unit.
6 0
3 years ago
Other questions:
  • A slit 0.240mm wide is illuminated by parallel light rays with a wavelength 600nm . The diffraction pattern is observed on a scr
    11·1 answer
  • A fortnite is an old English term that means 14 days. How many seconds are in a fortnite?
    12·2 answers
  • You need to prepare a 0.199-mm-diameter tungsten wire with a resistance of 3.09 kÏ. how long must the wire be? the resistivity o
    9·1 answer
  • Joe was asked to describe the movements the Earth makes as it rotates on its axis and revolves around the sur
    13·2 answers
  • About 10% of the water in the world ocean makes up all of the surface currents. most surface currents move water above the _____
    11·1 answer
  • The diameter of a segment of an artery is reduced by a factor of two due to an obstruction. Assume that the flow is incompressib
    7·1 answer
  • Why is their displacement the same when the distance each traveled was different?
    7·1 answer
  • What do you think is the charge of the nucleus of an atom
    5·1 answer
  • Layer T contains a well-known index fossil that is 120 million years old. Layer R contains a different index fossil that is 100
    14·1 answer
  • A dog travels 3m East and then 4m West, what is his displacement?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!