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
IrinaVladis [17]
3 years ago
11

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

Physics
2 answers:
Ronch [10]3 years ago
5 0

Answer:

Electric current

Explanation:

The others do not pertain to the flow of electrons. Positive current is the closest but it refers to the positive flow of electrons not just the flow of electrons.

Lady_Fox [76]3 years ago
4 0

Answer:

Electric Current

Explanation:

Electric current: An electric current is the rate of flow of electric charge past a point or region.

You might be interested in
Crude oil is a mixture of many different components. The extraction of crude oil from the Earth is important, but its refinement
Neporo4naja [7]

Answer: Different fuel components boil at different temperatures, allowing them to be separated.

Explanation:

3 0
3 years ago
Why is the earth sphered but we cant fall off
anygoal [31]
Because of Gravity, Basically a force so strong it constantly pulls us to the earth with 1 G (Maybe 100 pounds of force constantly pulling us to the earth)
3 0
3 years ago
What does a lunar eclipse and a solar eclipse have in common
liraira [26]
During either one, the sun, moon, and Earth are lined up in the same straight line. The difference is whether the moon or the Earth is the one in the "middle".
3 0
3 years ago
Two Earth satellites, A and B, each of mass m, are to be launched into circular orbits about Earth's center. Satellite A is to o
Pachacha [2.7K]

(a) 0.448

The gravitational potential energy of a satellite in orbit is given by:

U=-\frac{GMm}{r}

where

G is the gravitational constant

M is the Earth's mass

m is the satellite's mass

r is the distance of the satellite from the Earth's centre, which is sum of the Earth's radius (R) and the altitude of the satellite (h):

r = R + h

We can therefore write the ratio between the potentially energy of satellite B to that of satellite A as

\frac{U_B}{U_A}=\frac{-\frac{GMm}{R+h_B}}{-\frac{GMm}{R+h_A}}=\frac{R+h_A}{R+h_B}

and so, substituting:

R=6370 km\\h_A = 5970 km\\h_B = 21200 km

We find

\frac{U_B}{U_A}=\frac{6370 km+5970 km}{6370 km+21200 km}=0.448

(b) 0.448

The kinetic energy of a satellite in orbit around the Earth is given by

K=\frac{1}{2}\frac{GMm}{r}

So, the ratio between the two kinetic energies is

\frac{K_B}{K_A}=\frac{\frac{1}{2}\frac{GMm}{R+h_B}}{\frac{1}{2}\frac{GMm}{R+h_A}}=\frac{R+h_A}{R+h_B}

Which is exactly identical to the ratio of the potential energies. Therefore, this ratio is also equal to 0.448.

(c) B

The total energy of a satellite is given by the sum of the potential energy and the kinetic energy:

E=U+K=-\frac{GMm}{R+h}+\frac{1}{2}\frac{GMm}{R+h}=-\frac{1}{2}\frac{GMm}{R+h}

For satellite A, we have

E_A=-\frac{1}{2}\frac{GMm}{R+h_A}=-\frac{1}{2}\frac{(6.67\cdot 10^{-11})(5.98\cdot 10^{24}kg)(28.8 kg)}{6.37\cdot 10^6 m+5.97\cdot 10^6 m}=-4.65\cdot 10^8 J

For satellite B, we have

E_B=-\frac{1}{2}\frac{GMm}{R+h_B}=-\frac{1}{2}\frac{(6.67\cdot 10^{-11})(5.98\cdot 10^{24}kg)(28.8 kg)}{6.37\cdot 10^6 m+21.2\cdot 10^6 m}=-2.08\cdot 10^8 J

So, satellite B has the greater total energy (since the energy is negative).

(d) -2.57\cdot 10^8 J

The difference between the energy of the two satellites is:

E_B-E_A=-2.08\cdot 10^8 J-(-4.65\cdot 10^8 J)=-2.57\cdot 10^8 J

4 0
3 years ago
If a 100 N net force act on a 50-kg car, what will the acceleration be
inna [77]
Acceleration = force / mass.

A = 100/50 = 2 m/s^2 .
7 0
3 years ago
Other questions:
  • Choose the statement(s) that is/are true about the ratio \frac{C_p}{C_v} C p C v for a gas? (Ii) This ratio is the same for all
    15·1 answer
  • Technician a says that some passenger vehicles use more than one evaporator. technician b says that some passenger vehicles use
    7·1 answer
  • How do you find average velocity during free fall?
    8·2 answers
  • A car with four passengers will have a shorter braking distance than a car with one braking distance. True or false. Why?
    10·1 answer
  • A railroad flatcar is traveling to the right at a speed of 13.0 m/s relative to an observer standing on the ground. someone is r
    5·1 answer
  • A container of volume 0.6 m^3 contains 5.3 mol of argon gas at 24°C. Assuming argon behaves as an ideal gas, find the total inte
    7·1 answer
  • According to the Holland Codes, which career is best suited to someone who scored highest in the investigative category?
    8·1 answer
  • 10. Juan wants to see how air expands when it is heated. He is able to use any of the following supplies - a balloon, a heat lam
    6·2 answers
  • Which produces more energy? Nuclear fission or nuclear fission?
    9·1 answer
  • A ball is gently dropped from a height of 20 m. If its velocity Increases uniformly at the rate of 10 m s2, with what velocity w
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!