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
sleet_krkn [62]
3 years ago
15

The earth has a vertical electric field at the surface, pointing down, that averages 100 N/C. This field is maintained by variou

s atmospheric processes, including lightning. What is the excess charge on the surface of the earth?
Physics
1 answer:
Kipish [7]3 years ago
6 0

Answer:

The excess charge on earth's surface was calculated to be 4.56 × 10⁵ C

Explanation:

Using the formula for an electric field;

E = kQ/r²

k = 1/(4πε₀) = 8.99 × 10⁹ Nm²/C²

E = 100N/C

r = radius of the earth = 6400 km = 6400000m

Q = Er²/k = 100 × (6400000)²/(8.99 × 10⁹)

Q = 455617.4 C = 4.56 × 10⁵ C

Hope this helps!!!

You might be interested in
If the mass of a material is 114 grams and the volume of the material is 13 cm3, what would the density of the material be?
laila [671]
114/13=m/v=d
d=8.7692 g/cm^3
4 0
3 years ago
If someone drops a cup, it falls to the ground. Why doesn't the gravitational force between the person's hand and the cup keep t
Genrish500 [490]

Answer:

The gravity from the person's hand is weaker than the gravity from the pull of the earth

Explanation:

The gravity from the person's hand is weaker than the gravity from the pull of the earth

5 0
3 years ago
Describe how work is done by a skater pulling in her arms during a spin. In particular, identify the force she exerts on each ar
liberstina [14]

Answer:

 ∑ τ =0,  L₀ = L_{f}

Explanation:

In a circular turning movement, when the arms are extended and then contracted in two possibilities:

- They are lowered the force of gravity is what pulls them, the tension of the muscle becomes zero to allow this movement.

    In this movement the force is vertical(gravity) and the movement of the center of mass of each arm is vertical, so that the work is the weight value of the arm by the distance traveled by the center of mass.

- Another possibility is that the arms have stuck to the body, in this case the person's muscles perform the force, this force is horizontal and the displacement is the horizontal of the center of mass of the arms from the extended position to the contracted

 

In these movements the torque of the external force is equal for each arm, but in the opposite direction, so they are canceled where a net torque of zero, this causes the angular momentum to be preserved, which changes is the moment of inertia of the system and therefore you must also change the angular velocity to keep your product constant

          ∑ τ =0

                L₀ = L_{f}

              I₀ w₀ = I w

4 0
3 years ago
Helpp
frosja888 [35]
B, refraction I believe.
5 0
2 years ago
According to Newton's Law of Cooling, if a body with temperature T 1 is placed in surroundings with temperature T 0, different f
Mila [183]

We can substitute the given values into the equation for T, given the surrounding temperature T0 = 0, initial temperature T1 = 140, constant k = -0.0815, and time t = 15 minutes.

T = 0 + (140 - 0)e^(-0.0815*15) = 140e^(-1.2225) = 41.23°F

3 0
3 years ago
Read 2 more answers
Other questions:
  • Explain why When a small drop of detergent is placed on water, the needle moves rapidly away from it and sinks when more deterge
    12·1 answer
  • How does distance affect gravity???
    7·2 answers
  • Is Experience Nature or Nurture
    11·1 answer
  • Which Astronomer estimated the relative size and distance of the moon and sun?
    9·1 answer
  • The earth's orbital angular speed in rad/s due to its motion around the sun
    11·1 answer
  • 1 Do alien exist<br>2 why sky is blue<br>3 what is the weight of sky<br>4 why occasion is blue​
    12·2 answers
  • What are (a) the lowest frequency, (b) the second lowest frequency, and (c) the third lowest frequency for standing waves on a w
    9·1 answer
  • Which of the following would NOT be considered vigorous aerobic exercise?
    5·2 answers
  • A current of 15 Amps flows through a circuit with a resistance of 0.10 Ohms. What is the voltage?
    15·1 answer
  • two forces are acting on a boat. one force of 400N is due to current in the river, acting downstream. the other force due to the
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!