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
Lesechka [4]
3 years ago
15

¿Qué resistencia debe ser conectada en paralelo con una de 20 Ω para hacer una

Physics
1 answer:
ValentinkaMS [17]3 years ago
5 0

Answer:

60 Ω

Explanation:

R(com) = 15 Ω

1/R(com) = 1/R1 + 1/R2 + 1/R3 ..... + 1/Rn

1/15 = 1/20 + 1/R2

1/R2 = 1/15 - 1/20

1/R2 = (4 - 3) / 60

1/R2 = 1/60

R2 = 60 Ω

así, la combinada de resistencia necesaria es 60 Ω

You might be interested in
A circular loop with radius r is rotating with constant angular velocity ω in a uniform electric field with magnitude E. The axi
inn [45]

Answer:

\Phi_{E} = E\pi r^2 \omega t

Explanation:

The electric flux is defined as the multiple of electric field and the area that the electric field passes through, such that

\Phi_{E} = \vec{E}\vec{A}

When calculating the electric flux, the angle between the directions of electric field and the area becomes important, especially if the angle is changing with time.

The above formula can be rewritten as follows

\Phi_{E} = EA\cos(\theta)

where θ is the angle between the electric field and the area of the loop. Note that, the direction of the area of the loop is perpendicular to the plane of the loop.

If the loop is rotating with constant angular velocity ω, then the angle can be written as follows

\theta = \omega t

At t = 0, cos(0) = 1 and the electric flux through the loop is at its maximum value.

Therefore the electric flux can be written as a function of time

\Phi_{E} = E\pi r^2 \omega t

3 0
3 years ago
A graph of the net force F exerted on an object as a function of x position is shown for the object of mass M as it travels a ho
saul85 [17]

The change in kinetic energy is \Delta K = 3Fd

Explanation:

According to the work-energy theorem, the work done on an object is equal to the change in kinetic energy of the object. Mathematically:

W=K_f -K_i= \Delta K

where :

W is the work done on the object

K_f is the final kinetic energy of the object

K_i is the initial kinetic energy

Also, the work done on an object is (assuming that the force is applied parallel to the motion of the object):

W=F\Delta x

where

F is the magnitude of the force

\Delta x is the displacement of the object

In this problem, the force acting on the object is

F

While the displacement is the horizontal distance travelled, so

\Delta x = 3d

Therefore, the work done is

W=(F)(3d)=3Fd

And so the change in kinetic energy is

\Delta K = 3Fd

Learn more about work and kinetic energy:

brainly.com/question/6763771

brainly.com/question/6443626

brainly.com/question/6536722

#LearnwithBrainly

5 0
2 years ago
What type of force is keeping this person from falling through the wall
Softa [21]

Answer:

Friction

Explanation:

Friction keeps things from sliding into things according to newton's laws

5 0
2 years ago
Students in a science class were provided with this image and asked to identify which color of light would refract the most if w
djverab [1.8K]
Violet would refract the most as it has the shortest wavelength amongst the visible spectrum.
8 0
2 years ago
Why might acting happy actually make one happy
dexar [7]
Because they are mentally trying to extinguish the negative things in their lives and focus on the positive things
5 0
3 years ago
Other questions:
  • A net force of 500N acts on a 100 kg cart what is the acceleration
    12·1 answer
  • If we begin from star birth, the next key stage in the star-gas-star cycle occurs when a(n)_______ returns gas and new elements
    12·2 answers
  • The amount of work done to produce a sound determines which property of sound waves?
    9·2 answers
  • 3
    13·2 answers
  • What is the de Broglie wavelength of an object with a mass of 2.50 kg moving at a speed of 2.70 m/s? (Useful constant: h = 6.63×
    14·1 answer
  • The equation for the chemical reaction shown is not balanced. What number should replace the question mark to balance this equat
    9·1 answer
  • As time goes on, the ENTROPY in a closed system should increase. This is because of which Law?
    14·1 answer
  • A fan that is switched on for 1 minute uses 500 W usefully but also wastes 300 W through the emission of sound and heat. What's
    12·1 answer
  • Why might a food item such as bread not necessarily be a consumer good in all economic scenarios ?
    6·1 answer
  • A force can give a certain mass a certain acceleration. if i double the force and double the mass, the acceleration of this obje
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!