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
lyudmila [28]
3 years ago
5

so no body wants to help me:((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((

((((((((((((((((((((((((((((((
Physics
1 answer:
larisa [96]3 years ago
8 0
Yes i will help!!!!!!!!!!!!!!!!!!!!!
You might be interested in
Mark creates a graphic organizer to review his notes about electrical force. Which labels belong in the regions marked X and Y?
sveta [45]

Answer:

The correct answer is A

Explanation:

The question requires as well the attached image, so please see that below.

Coulomb's Law.

The electrical force can be understood by remembering Coulomb's Law, that  describes the electrostatic force between two charged particles. If the particles have charges q_1 and q_2, are separated by a distance r and are at rest relative to each other, then its electrostatic force magnitude on particle 1 due particle 2 is given by:

|F|=k \cfrac{q_1 q_2}{r^2}

Thus if we decrease the distance by half we have

r_1 =\cfrac r2

So we get

|F|=k \cfrac{q_1 q_2}{r_1^2}

Replacing we get

|F|=k \cfrac{q_1 q_2}{(r/2)^2}\\|F|=k \cfrac{q_1 q_2}{r^2/4}

We can then multiply both numerator and denominator by 4 to get

|F|=k \cfrac{4q_1 q_2}{r^2}

So we have

|F|=4 \left(k \cfrac{q_1 q_2}{r^2}\right)

Thus if we decrease the distance by half we get four times the force.

Then we can replace the second condition

q_{2new} =2q_2

So we get

|F|=k \cfrac{q_1 q_{2new}}{r_1^2}

which give us

|F|=k \cfrac{q_1 2q_2}{r_1^2}\\|F|=2\left(k \cfrac{q_1 q_2}{r_1^2}\right)

Thus doubling one of the charges doubles the force.

So the answer is A.

8 0
3 years ago
Read 2 more answers
if a car has a constant acceleration of 4 m/s^2, starting from rest, how fast is it traveling after 5 seconds?​
UkoKoshka [18]

Answer:

20 m/s

Explanation:

Recall that one of the equations of motions can be written:

v = u + at, (also see attached for reference)

Where,

v = final speed (we are asked to find this)

u = initial speed = 0 (because it starts from rest)

t = time taken = 5s

We simply substitute the given values into the equation:

v = u + at

v = 0 + (4)(5)

v = 20 m/s

3 0
3 years ago
Read 2 more answers
Newton's law of cooling states that the temperature of an object changes at a rate proportional to the difference between its te
schepotkina [342]

Answer:

6.77 minutes

Explanation:

172 degree - 78 degree = (185 degree - 78 degree)e−2 k

=> 94 = 107

e−2 k => 94 ÷ 107

k => ln (94÷107) / 2

147 - 78 = (185 - 78)e ^[ln (94÷107) / 2]

=> 69 = 107 e^ [ln (94÷107) / 2]

e^[ln (94÷107) / 2] =69 ÷ 107

=> t = [ln (69 ÷ 107)] ÷ [ln (94÷107) / 2]

t=> -0.4387 ÷ -0.0648

t => 6.77 minutes.

Therefore, the final answer to the question is 6.77 minutes.

4 0
3 years ago
Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600
alexandr402 [8]

earth still is not solid ... core is molten ... volcanoes, sea is liquid

at v v v beginning was gas ????

5 0
3 years ago
Help please, i don't know what the answer is but i accidently clicked D .....
GaryK [48]

Answer:

You are right correct option is D.

4 0
3 years ago
Other questions:
  • What does it mean to say the mass is conserved during a physical change ?
    5·2 answers
  • Does this show the geocentric or heliocentric idea of the solar system? Explain the difference
    5·2 answers
  • Which statement best describes the isothermal process? A. the temperature remains constant B. the temperature increases at a con
    5·2 answers
  • You drop a ball from the top of a building, how long does it take to reach the ground
    12·1 answer
  • Cual es el modulo del vector diferencia (a - b) entre dos vectores que forman un angulo de 30° entre si y cuyos módulos son 2m y
    11·1 answer
  • A 66 kg person is parachuting and experiencing a downward acceleration of 2.1 m/s2. The mass of the parachute is 4.0 kg. (a) Wha
    14·1 answer
  • Answer in detail? Describe an activity that gives an understanding of ‘Electrostatic force’.
    5·1 answer
  • I can use everything on my body to advance the ball but what?
    10·1 answer
  • Plz answer will give Brainliest answer to whoever does.
    8·1 answer
  • A force of 10 N causes a spring to extend by 20 mm. Find a) the spring constant of the spring in N/m b) the extension of the spr
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!