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Humid air breaks down (its molecules become ionized) in a sufficiently strong electric field. Assume such an electric field has a strength of 4.4 106 N/C. What is the magnitude of the electrostatic force on the following particles due to this field?
for an electron?
for an ion with a single electron missing?
Illustration on Eratosthenes' process
A flask containing 800 g. of water is heated. If the temperature of the water increases from 27 degrees Celsius to 88 degrees Celsius, how much heat (in joules) did the water absorb.
A farmer planted a field of Bt 123 corn and wants to estimate the yield in terms of bushels per acre. He counts 22 ears in 1/1000 of an acre. He determines that each ear has about 700 kernels on average. He also knows that the bushel contains abou..
A 25-g rifle bullet travelling 280-m/s buries itself in a 3.6-kg pendulum hanging on a 2.8m long string, which makes the pendulum swing upward in an arc. Find out the vertical and horizontal components of pendulum's displacement.
A rock is thrown downward into a well that is 8.90 deep. If the splash is heard 1.20 seconds later, what was the initial speed of the rock? Take the speed of sound in the air to be 343 m/s.
A trombone has an effective length of 160 cm and the speed of sound in air is 345 m/s. Notes are selected by moving a U-shaped tube in or out to change effective length of the trombone.
A toy spacecraft is launched directly upward. When toy reaches its highest point, a spring is released and the toy splits into two parts with masses of .c2 kg and .08 kg.
he first person is initially moving forward with a speed of 2.50 m/s, and the second person is initially at rest. Illustrate what are the velocities of the two people after the snowball is exchanged? Disregard the friction between the skates and ..
A slingshot fires a pebble from the top of a building at a speed of 20.00 m/s. The building is 28-m tall. Ignoring air resistance, find out the speed with which pebble strikes the ground when the pebble is fired (a) horizontally (b) vertically str..
It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.151 s, illustrate what is the average force exerted by the wall on the ball?
Two loudspeakers on a concert stage are vibrating in phase. A listener is 57m from the left speaker and 30m from the right one. The listener can respond to all frequencies from 20 to 20 000 Hz.
A box is put on a slide to move it from one part of a factory to another the slide is at an angle of 20 degrees below the horizontal the coefficient of friction between the box and slide is 0.352 what is the acceleration of the box.
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