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
nikdorinn [45]
3 years ago
8

A charging RC circuit controls the intermittent windshield wipers in a car. The emf is 12.0 V. The wipers are triggered when the

voltage across the 125 mu or micro F capacitor reaches 10.0 V; then the capacitor is quickly discharged (through a much smaller resistor) and the cycle repeats. What resistance should be used in the charging circuit if the wipers are to operate once every 1.80 s?
Physics
1 answer:
lilavasa [31]3 years ago
3 0

Answer:

R=803k\Omega

Explanation:

We have the following information,

V_0 = 12V\\V=10V\\c= 1.25*10^{-6}F\\t=1.8s

We apply the equation for capacitor charging the voltage across it,

V=V_0 (1-e^{-t/x})\\e^{-t/x}=1-(\frac{V}{V_0})\\-\frac{t}{Rc}=ln(\frac{V}{V_0})\\R=-\frac{t}{ln(\frac{V}{V_0})*c}

Replacing values,

R=-\frac{1.8}{ln(10/12)*1.25*10^{-6}}

R=803k\Omega

You might be interested in
It takes brooke 10minutes to run 1 mile what is her speed in miles per minutes
hjlf

If you divide miles by minutes, the answer will have units of
miles per minute, which is exactly what you want.

(1 mile) / (10 minutes) = 1/10  mile/minute = 0.1 mile per minute


6 0
3 years ago
Who yall think gonna win Seahawks or Vikings? Seahawks all the way
myrzilka [38]

Answer:

Seahawks

Explanation:

THEY ARE THE BEST TEAM!!!

3 0
3 years ago
Read 2 more answers
How fast would you have to travel on the surface of earth at the equator to keep up with the sun (that is, so that the sun would
professor190 [17]

Answer: 1037 miles per hour

Explanation: In order to see the sun in the same position in the sky, you would have to travel against the speed of rotation of the earth, because this is what causes the sun to appear in a constantly changing position.

Because of this, we will have to calculate the speed of rotation of the earth. To get started, we must know the circumference of the earth. Assuming the circumference formula for a sphere,

Circumference=2\pi R

Where R is the radius of the earth, we find that the perimeter of the earth is approximately 24881 miles. The equation to calculate speed is given by

v=\frac{Distance}{Time}

Because the earth completes one rotation in 24 hours, we have to find the speed of rotation as the perimeter of the earth divided by 24 hours.

The obtained result is 1037 miles per hour.

You would have to travel at 1037 miles per hour in the direction opposite to the direction the rotation is ocurring in.

5 0
3 years ago
A stationary rock on a hill has
Mekhanik [1.2K]

Answer: potential energy but no kinetic energy

Explanation:

Since the rock is stationary, velocity is zero, therefore no kinetic energy,but there's potential energy because the rock is at rest,

5 0
3 years ago
Read 2 more answers
6. 498.82 mg comverted to kg​
Ivanshal [37]

Answer:

0.00049882 kg

........................

6 0
3 years ago
Read 2 more answers
Other questions:
  • How do you find the mechanical advantage of a wheel and axle
    11·1 answer
  • A rock of mass 170 kg needs to be lifted off the ground. One end of a metal bar is slipped under the rock, and a fulcrum is set
    5·1 answer
  • A periodic longitudinal wave that has a frequency of 19.0 hz travels along a coil spring. if the distance between successive com
    15·1 answer
  • What is the core concept of personality
    10·2 answers
  • How does conserving and recycling paper help manage energy resources?
    7·1 answer
  • The atomic mass of an element is defined as the weighted average mass of that element’s
    14·1 answer
  • In which galaxy is our solar system located?
    8·2 answers
  • If a group of workers can apply a force of 1000 newtons to move a crate 20.0 meters on a frictionless ramp: How high up a ramp w
    11·1 answer
  • Given f(x)=2x+7, which of the following is the value of x when f(x)=13?
    7·1 answer
  • PLS ANSWER FAST WILL GIVE BRAINLY!!!!
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!