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
Nookie1986 [14]
3 years ago
7

Who knows how to do this?

Physics
1 answer:
SIZIF [17.4K]3 years ago
3 0

Answer:

1)   F = 8.789 10² N, 2)   F = 1.5 10⁴ N

Explanation:

We can solve this exercise using Coulomb's law

         F =k \frac{q_1q_2}{r^2}

Knowing that charges of the same sign repel

let's apply this equation to our case

1) the charges are q = - 0.0025 C and the distance between them r = 8 m

       we calculate

           F = 9 10⁹ 0.0025 0.0025 /8²

           F = 8.789 10² N

as the two charges are of the same sign the force is repulsive

2) q₁ = -0.004C and q₂ = -0.003 C with a distance of r = 3.0 m

    we calculate

             F = 9 10⁹ 0.004 0.003 / 3²

             F = 1.5 10⁴ N

You might be interested in
How are elements, compounds, and molecules all related to one another?
kkurt [141]

Answer:

When elements combine, they form molecules. Simply put, a molecule is a group of two or more atoms chemically bonded together. ... Certain molecules are also compounds. A compound is a group of two or more different atoms chemically bonded together.

4 0
3 years ago
Read 2 more answers
_______ was the first person to propose the idea of moving continents as a scientific hypothesis.
yan [13]
The answer is b alfred wegener 


8 0
3 years ago
Read 2 more answers
When the pressure at the bottom of a submerged object is greater than the pressure at the top of submerged object, buoyant force
ELEN [110]
The answer would most like be true!
4 0
3 years ago
Read 2 more answers
A car slows down from speed of 72
Nastasia [14]

Explanation:

Given parameters:

Initial velocity = 72km/hr

Final velocity  = 0km/hr

Time taken  = 25s

Unknown:

Acceleration = ?

Solution:

To solve this problem, convert km/hr to m/s;

           1000m = 1km

           3600s = 1hr

  72km/hr;

          1km/hr  = 0.278m/s

         72km/hr = 0.278 x 72  = 20.02m/s

Acceleration is the change in velocity divided by the time taken;

       Acceleration = \frac{final velocity - initial velocity }{time}  

       Acceleration  = \frac{0 - 20.02}{25}   = -0.8m/s

The car  is actually decelerating at a rate of 0.8m/s

5 0
3 years ago
Starting at 1.0 m/s, a cheetah runs with a constant acceleration for 4.8 s reaching a speed of 28 m/s. What is the acceleration
LenaWriter [7]

Answer:

c.5.6m/s^2

Explanation:

Initial velocity of cheetah,u=1 m/s

Time taken by cheetah =4.8 s

Final velocity of cheetah,v=28 m/s

We have to find the acceleration of this cheetah.

We know that

Acceleration,a=\frac{v-u}{t}

Where v=Final velocity of object

u=Initial velocity of object

t=Time taken by object

Using the formula

Then, we get

Acceleration, a=\frac{28-1}{4.8}=\frac{27}{4.8} m/s^2

Acceleration=a=5.6 m/s^2

Hence, the acceleration of cheetah=5.6m/s^2

5 0
3 years ago
Other questions:
  • Calculate the linear acceleration (in m/s2) of a car, the 0.330 m radius tires of which have an angular acceleration of 13.0 rad
    14·1 answer
  • Ah electron is a negatively charged particle that has a charge of magnitude, e - 1.60 x 10-19 C. Which one of the following stat
    12·1 answer
  • A baseball with a mass of 142 grams is thrown across a field. It accelerates at a rate of 8 m/s^2. What is the force acting on t
    13·1 answer
  • Can someone please help me and write the answers? i need this and it’s really important!!
    6·1 answer
  • When hydrochloric acid is dissolved in water it produces _______ and ________ ions.
    6·1 answer
  • It is best to say that marine debris
    13·1 answer
  • During a medical condition screening lung capacity testing is a standard procedure. True of false
    13·1 answer
  • What is the kinetic energy of a 24-kg mass that is moving with a velocity of 2 m/s?
    8·2 answers
  • If I work out rotational energy to be 102.2J which equals kg.M/s^2, and I hadn't factored time into it, would that be Joules per
    10·1 answer
  • A kind of variable that a researcher purposely changes in investigation is
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!