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
Alika [10]
3 years ago
15

Imagine two free electrons that collide elastically in an acidic solution where one electron was moving and the other electron w

as stationary. When the electrons separate the moving electron now has a velocity of 400 m/s and the stationary electron now has a velocity of 200 m/s. What was the initial kinetic energy of the moving electron
Physics
1 answer:
IgorLugansk [536]3 years ago
4 0

Answer: 9.1 × 10^-26 Joule

Explanation:

Since the collision is elastic. The kinetic energy will be conserved. That is, the sum of kinetic energy before collision will be the same as the sum of the

energy after collision.

Mass of an electron = 9.1 × 10^-31 kg

Given that the velocity of the moving electron = 400 m/s and the stationary electron now has a velocity = 200 m/s. 

K.E = 1/2mv^2

Add the two kinetic energies

1/2mV1^2 + 1/2mV2^2

1/2m( V1^2 + V2^2 )

Since they both have common mass

Substitute m and the two velocities

1/2 × 9.1×10^-31( 400^2 + 200^2)

4.55×10^-31 ( 160000 + 40000 )

4.55×10^-31 × 200000

K.E = 9.1 × 10^-26 Joule

Therefore, the initial kinetic energy of the moving electron is 9.1×10^-26 J

You might be interested in
What is the kinetic energy of a 10 kg ball moving at a rate of 2 m/s
Gnoma [55]

Answer:

20 J

Explanation:

KE = ½ mv²

KE = ½ (10 kg) (2 m/s)²

KE = 20 J

7 0
4 years ago
Calculate the net force if the forces are parallel 4N 4N
iogann1982 [59]

Answer:

The net force is zero Newtons (0 N).

Explanation:

If the forces on one side is 4N and the forces on another side are 4N, the forces cancel out and you have a net force of zero. This means the object is at rest or is moving at a constant rate based on the question.

Hope this helps!

5 0
3 years ago
Read 2 more answers
A circular rod has a radius of curvature R = 9.09 cm and a uniformly distributed positive charge Q = 6.49 pC and subtends an ang
Digiron [165]

Answer:

E = 1.19 N/C

Explanation:

Let's first determine the length of the arc which can be given as:

L= Rθ

where:

L = length of the arc

R = radius of curvature

θ = angle in radius

L = (9.09×10⁻²m)(2.59)

L = (0.0909)(2.59)

L = 0.235431 m

Then, the magnitude of electric field that Q produces at the center of curvature can be calculated by using the formula:

E= \frac{\lambda}{4 \pi E_oR}[sin\frac{\theta}{2}-sin(-\frac{\theta}{2})]

E= \frac{\lambda}{4 \pi E_oR}[sin\frac{\theta}{2}+sin(\frac{\theta}{2})]

E= \frac{2\lambda}{4 \pi E_oR}[sin\frac{\theta}{2}]

Since \lambda = \frac{Q}{L}

where;

L = length

Q = charge

λ =  density of the charge;

then substituting \frac{Q}{L} for λ, we have :

E= \frac{2(\frac{Q}{L})}{4 \pi E_oR}[sin\frac{\theta}{2}]

E= \frac{2Q[sin\frac{\theta}{2}]}{4 \pi E_oLR}

substituting our given parameter; we have:

E= \frac{2(6.26*10^{-12}C)[sin\frac{2.59rad}{2}]}{4 \pi (8.85*10^{-12}C^2/N.m^2)(0.235431)(0.0909)}

E = 1.1889 N/C

E = 1.19 N/C

∴ the magnitude of the electric field that Q produces at the center of curvature = 1.19 N/C

4 0
3 years ago
Place the single weight with a known mass on the spring and release it. Eventually, the weight will come to rest at an equilibri
aliya0001 [1]

Answer:

X=m*g/K

Explanation:

Since the elastic force of the spring is balancing the force of gravity:

Fe = m*g

Now, on the spring by Hook's law, the magnitude of the elastic force will be:

Fe = K*X     where K is the elastic constant of the spring and X is the distance the spring is strectches measured from its original lenght to its current length.

Replacing this value:

K*X = m*g   Solving for X:

X = m*g/K    This value is directly proportional to the object's weight and inversely proportional to the spring's constant.

3 0
4 years ago
Which statement correctly compares the speed of light
Elodia [21]

The speed of light in glass is slower than the speed of light through space.


4 0
4 years ago
Read 2 more answers
Other questions:
  • When calculating gravity between 2 objects, where should the distance be measure from?
    6·1 answer
  • The moon travels in a nearly circular path around earth. If somehow gravitation between earth and moon disappeared, how would th
    15·2 answers
  • Which kind of pressure prevents stars of extremely large mass from forming?
    15·2 answers
  • Who is Rachel Carson and why is she important to environmentalism
    9·1 answer
  • Which observations correctly describe the second law of thermodynamics? Check all that apply.
    8·1 answer
  • Which one of the following statements indicates the result of Kepler's astronomical calculations?
    11·1 answer
  • What is the period of a satellite in a geosynchronous orbit?
    15·1 answer
  • Science and technology are interdependent. Advances in one lead to advances in the other. Give
    15·1 answer
  • Where do organisms occur?
    12·1 answer
  • I need help. Please just help me.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!