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An electron is released a shortdistance above Earth's surface. A secondelectron directly below it exerts an electrostaticforce on the first electron just great enoughto cancel the gravitational force onit. The value of Coulomb'sconstant is 8.98755 × 109 N· m2/C2and the acceleration of gravity is9.81m/s2.
How far below the first electronis the second?
A dietary Calorie is actually a kilocalorie (note that by convention a capital 'C' is always used to indicate a dietary calorie and a lower case 'c' is used otherwise). Given that 1 cal = 4.186 J express the average daily dietary intake of a person..
A circuit consists of an ideal ac generator, a 25 µF capacitor, and an 90? resistor, all connected in series. Find the average power supplied by the generator
A Rubber ball mass m movie at a speed of 1.0 m/s in the positive x direction hits another rubber ball of a mass 2m at rest. what are the speeds and directions of the two balls moving afterwards
Which of the folllowing are traveling faster than their terminal speed? Choose all that apply. A shooting star (meteor)A basketball at the moment it leaves theshooter's hands A penny, 16s after it has been dropped from the top of the Sears TowerA ..
A candle is placed 16.85 cm in front of a convex mirror. When the convex mirror is replaced with a plane mirror, Find the focal length of the convex mirror
The minute hand of a wall clock measures 14 cm from its tip to the axis about which it rotates. The magnitude and angle of the displacement vector of the tip are to be determined for three time intervals.
a quarterback claims that he can throw the football a horizontal distance of 183 m 200 yd. furthermore he claims that
A converging lens (f=+20cm) is located 60cm to the left of a diverging (f=-30cm). What is the overall magnification of the object
When a certain air-?lled parallel-plate capacitor is connected across a battery, it acqquires a charge (on each plate) of magnitude 131 µC. What is the dielectric constant of the slab
Determine the plate scale and field-of-view for the 8192x8192 pixel MOSAIC imaging camera on the 4-m Mayall Telescope at Kitt Peak Observatory. MOSAIC is a prime focus instrument (f/2.95) and has 15µm pixels
Three carts of masses m1 = 4.50 kg, m2 = 12.00 kg, and m3 = 3.00 kg move on a frictionless, horizontal track with speeds of v1 = 4.50 m/s to the right, v2 = 3.00 m/s to the right, Find the final velocity of the train of three carts
a globular cluster at its farthest point from the galactic center is at a distance of 104 pc.what is its period of
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