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
JulsSmile [24]
3 years ago
14

"Two electrostatic point charges of +68.0 µC and +56.0 µC exert a repulsive force on each other of 179 N. What is the distance b

etween the two charges? The value of the Coulomb constant is 8.98755 × 109 N · m2 /C 2 . Answer in units of m."
Physics
2 answers:
timama [110]3 years ago
5 0

Answer: The distance between the charges is r=0.44m

Explanation

Step one

Using the formula

F = (k q1*q2) /r²

F = electric force

k = Coulomb constant

q1, q2 = charges

r = distance of separation

Step two

Given data

F=179N

q1 and q2=+68.0 µC and +56.0 µC

k=8.98755 × 10^9 N

r=?

Step three

Inputting our values we have

179=8.9875×10^9(68*10^-6*56*10^-6)/r²

179=(8.9875*10^9*3.8*10^-9)r²

179=34.15/r²

Make r subject of formula we have

r²=34.15/179

r²=0.190

r= √0.190

r=0.44m

Coulomb's law states that: The magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them.

Svetradugi [14.3K]3 years ago
5 0

Answer:  

r  = 0.437m≈0.4m

 

Explanation:

F= \frac{KQq}{r²}

Where K= 8.98755 × 109 N · m2 /C 2

           F=  179 N

           Q= +68.0 µC= 68.0 × 10^{-6}C

           q=  +56.0 µC= 56.0 × 10^{-6}C

           r= ?

To find r, make r the subject of the formula.

F= \frac{KQq}{r²}

r²= \frac{KQq}{F}

r= \sqrt{} \frac{KQq}{F}  

Then input the values,

r  = \sqrt{} \frac{(8.98755 X 10^{9} )(68.0 X 10^{-6} )(56.0 X 10^{-6} ) }{179}

   =  \sqrt{} \frac{34224.5904 X 10^{9-12} }{179}  

  =  \sqrt{191.1988 X 10^{-3}  

  = 0.437m≈0.4m

 

You might be interested in
Please help me out if you want brainliest !!!!! ASAP easy
Vinvika [58]

Answer:

Road A = 8 meters Wet

Road B = 2 meters Muddy

Road C = 12 meters Dry

Explanation:

8 0
3 years ago
A submarine can detect an approaching enemy submarine using sonar. If a stationary submerged submarine emits a 100kHz tone and r
kotegsom [21]

Answer:

B) 1.5 m/s

Explanation:

The apparent frequency will be enhanced due to Doppler effect

If f be the apparent frequency , F be the real frequency  , V be the velocity of sound and v be the velocity of approaching submarine then f is given by

f = F \frac{V+v}{V-v}\\

\frac{f}{F} =\frac{V+v}{V-v}\\  

\frac{f}{F}-1  =\frac{V+v}{V-v}-1\\

\Delta f = \frac{2vf}{V-v}\\

200=\frac{2\times v\times 100\times 1000}{1482-v}\\  

v=1.48 m/s

7 0
3 years ago
Match the words in the left-hand column to the appropriate blank in the sentences in the right-hand column.
zheka24 [161]

Answer:

1. Molecular cloud

2. Close binary

3. Brown dwarf

4. Protostellar wind

5. Thermal pressure

6. Protostellar disk

7. Jet

8. Degeneracy pressure

Explanation:

1. The Sun formed, probably along with other stars, within a large molecular cloud.

2. A Close binary consists of two stars that orbit each other every few days.

3. A Brown dwarf is a "star" so small in mass that its core never gets hot enough to sustain nuclear fusion reactions.

4. Most of the gas remaining from the process of star formation is swept into interstellar space by a protostellar wind.

5. As a protostar's internal temperature increases, its growing thermal pressure helps slow its contraction due to gravity.

6. Planets may form within the protostellar disk that surrounds a forming star.

7. Mass can be lost through a jet of material ejected along a protostar's axis of rotation.

8. A "star" with mass below 0.08 solar mass has its gravitational contraction halted by degeneracy pressure.

8 0
3 years ago
When you throw a ball, the work you do to accelerate it equals the kinetic energy the ball gains. if you do twice as much work w
nata0808 [166]
It doesn't because when u threw it the first time, u notice that the ball eventually came to a stop because of the force that was acting upon it. Although when u throw it harder it will start out faster than the first time u threw it because u put more kinetic energy onto the ball. But the same thing happens with this ball that happened to the second ball, they both have a type of force acting upon them.
8 0
3 years ago
The quantum mechanical approach to atomic structure permits the calculation of 1. the most probable distance between any two spe
miss Akunina [59]

Answer:

2. a region about the nucleus in which an electron of specified energy will probably be found

Explanation:

With quantum mechanics we can find the wave function that describes the movement of the particles, the interpretation of this wave function is through the probability density (φ* φ).

This probabilistic interpretation of the energies, position and amounts of motion electrons allow us to find the region around the nucleus where an electron of specific energy can be found with a given probability.

The correct answer is 2

3 0
3 years ago
Other questions:
  • a 62.0 kg curler runs into a stationary 78.1 kg curler and they hold on to each other. Together they move away at 1.29 m/s, west
    9·1 answer
  • What ions are formed when hcl dissolves in water?
    5·1 answer
  • If we compare the force of gravity too strong nuclear force we would conclude that
    5·2 answers
  • All electric circuits have devices that are run by _____ energy.
    14·1 answer
  • What will happen if a car experiences a 300 N force to the right from the engine and a separate 150 N force due to friction and
    7·1 answer
  • Average speed can be represented by the mathematical expression
    12·1 answer
  • 7. 10 Kg of water at 90°C is cooled by mixing 20kg of water at 20°C. What
    11·1 answer
  • A student determines that a sample has a mass of 157.2 g and a volume of 20 cm^3. Which
    15·1 answer
  • How strong is a black holes gravity?<br> (you will get a lot on notifications if you answer)
    7·2 answers
  • Why are eight electrons (four pairs) surrounding each non-hydrogen atom the optimal electronic arrangement for covalent molecule
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!