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A raindrop inside a thundercloud has charge -8e. What is the electric force on the raindrop if the electric field at its location (due to other charges in the cloud) has magnitude 2.6 multiplied by
A small sphere with a charge of -5.8 multiplied by 10-7 C is placed in a uniform electric field of magnitude 1.7 multiplied by 106 N/C pointing to the west. What is the magnitude and direction of the
A guitar string has a tension T, length L, and diameter D. Give the multiplicative factor by which the fundamental frequency of the string changes under the following conditions: (a) The tension in
A hammer thrower accelerates the hammer (mass = 7.30 kg) from rest within four full turns (revolutions) and releases it at a speed of 28.0 m/s. Assuming a uniform rate of increase in angular velocit
In a Mossbauer effect experiment, the change in frequency of a 3.5 x 10^18 Hz electromagnetic wave can be detected if the source and absorber have a relative speed of 0.03 mm/s with respect to each
King Arthur's knights fire a cannon from the top of the castle wall. The cannonball is fired at a speed of 52 m/s and at an angle of 34°. A second cannonball that was accidentally dropped hits
Hydraulic engineers in the United States often use, as a units of volume of water, the acre-foot, defined as the volume of water that will cover 1 acre (where 1 acre = 43560 ft2) of land to a depth
A platinum resistance thermometer has resistances of 220.0 when placed in a 0°C ice bath and 262.8 when immersed in a crucible containing a melting substance. What is the melting point of this s
An explorer is caught in a whiteout (in which the snowfall is so thick that the ground cannot be distinguished from the sky) while returning to base camp.
The near point for your myopic uncle is 10 cm. Your own vision is normal; that is, your near point is 25 cm. Suppose you and your uncle hold dimes (which are 1.7 cm in diameter) at your respective
An object has a weight of 0.874 N. It is suspended from a scale, which reads 0.704 N when the piece is submerged in water. What are the volume and density of the piece of metal?
Calculate the mass of the counterweight. Assume that Peter starts from rest. Calculate the tension in the line supporting the actor.
A Steel guitar string has a Tension, T, a length, L, and a diameter, D. Give the multiplicative factor by which the fundamental frequency of the string changes under the following conditions:
A charge of -2.355 µC is located at (3.055 m, 4.501 m), and a charge of 1.800 µC is located at (-2.372 m, 0). (a) Find the electric potential at the origin.
Two identical +8.0 µC point charges are initially spaced 5.3 cm from each other. If they are released at the same instant from rest, how fast will they be moving when they are very far away fr
A small object with a charge of -2.50 µC is attached to the string. Assume that the tension in the string is 0.350 N, and the angle it makes with the vertical is 15°. What is the magnitude
Point charges +2.0 nC and -5.0 nC are arranged on two vertices of an equilateral triangle. Find the magnitude and sign of third charge on the third vertice so that the potential at a point midway be
Block 1 of mass 130 kg rests on a table and is connected by a light cord to Block 2. Given that the angle theta = 30.0 ° and that the coefficient of static friction between Block 1 and the table
A railroad flatcar is loaded with crates having a coefficient of static friction of 0.360 with the floor. If the train is moving at 43.0 km/hr, in how short a distance can the train be stopped at a
A river flows due east at 1.50 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 10.0 m/s due north relative to the water. (A) What is the v
A fireman 50.0 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of 30.0° above the horizontal. If the speed of the stream as it leaves the hose
An artillery shell is fired with an initial velocity of 300 m/s at 55.0° above the horizontal. To clear an avalanche, it explodes on a mountainside 42.0 s after firing. What are the x and y coor
A force of 4.00 × 10-2 N is needed to move a charge of 63.0 µC a distance of 16.0 cm in the direction of a uniform electric field. What is the potential difference that will provide this
The record distance in the sport of throwing cowpats is 81.1 m. Assuming the initial launch angle was 45° and neglecting air resistance determine (a) the initial speed of the projectile and (b)
If the external field strength is 1250 N/C, what are the direction and strength of the field that is generated by the charges induced on the slab? What is the total charge on the negative side of th