In a thundercloud there may be an electric charge of +40 C near the top of the cloud and -40 C near the bottom of the cloud. These charges are separated by about 2.0 km. What is the electric force between these two sets of charges? (ke = 8.99 × 10^9 N•m2/C2)
a. 3.6 × 10^6 N
c. 3.6 × 10^7 N
b. 3.6 × 10^4 N
d. 3.6 × 10^5 N
A
You might also like to view...
A 1.7 H inductor has a current of 6.6 A flowing through it. The current reduces to 3.3 A over a period of 1.6 s. What is the average power the inductor supplies to the circuit as the current reduces?
A. 17 W B. 37 W C. 9.3 W D. 28 W E. 46 W
Gravitational Potential Energy: In the past, Earth has been hit by many asteroids, some very large. Suppose one such asteroid approached Earth so that when it was very far away it was traveling at 6500 m/s along a line that would miss the center of Earth by 8,500,000 m. Because of the gravitational attraction of Earth, it departed from this straight line and curved towards Earth, colliding with it. What was the speed of this asteroid when it hit Earth if we ignore the effect of the sun? The mass of Earth is 5.97 × 1024 kg, its radius is 6.38 × 106 m, and G = 6.67 × 10-11 N ? m2/kg2.
A. 11,400 m/s B. 12,900 m/s C. 13,700 m/s D. 15,800 m/s E. 16,400 m/s
If you are asked to make a very sensitive glass thermometer, which of the following working fluids would you choose?
1.mercury 2.alcohol 3.gasoline 4.glycerin
The solar radiation curve is
A) a dent in the spherical Sun. B) the path of the Sun as it circles Earth. C) a plot of Sun's brightness versus frequency of emission. D) a plot of sunlight colors versus their frequencies. E) a plot of light intensity versus temperature of the Sun.