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Two infinite, nonconducting, uniformly charged, flat surfaces are mutually perpendicular. One of the surfaces has a charge distribution of +19.5 pC/m2, and the other has a charge distribution of -4
A metallic sphere has a charge of +4.5 nC. A negatively charged rod has a charge of -6.0 nC. When the rod touches the sphere, 9.1 109 electrons are transferred. What are the charges of the sphere a
How many electrons must be removed from each of two 4.8-kg copper spheres to make the electric force of repulsion between them equal in magnitude to the gravitational attraction between them?
You then stretch the spring from the previous problem an additional 12 cm and release it. What is the period of oscillation now?
A vertical, 1.10-{m} length of 18-gauge (diameter of 1.024 {mm}) copper wire has a 200.0-N ball hanging from it. What is the wavelength of the third harmonic for this wire? A 1000-{\N} ball now repl
A 60.0-kg mass person wishes to push a 100-kg mass box across a level floor. The coefficient of static friction between the person's shoes and the floor is 0.700. What is the maximum coefficient of
A 30.0-kg object has a drag force with a magnitude proportional to the square of its speed. The object falls with an acceleration 4.00 m/s2 downward when it is falling downward at 70.0 m/s. What is
An object is acted on by a drag force with a magnitude that is proportional to the speed. The object accelerates downward at 3.00 m/s2 when it is falling with a speed 20.0 m/s. What is the terminal
What is the terminal velocity of a 6.00-kg mass object in falling with a drag force with a magnitude that depends on speed, v, as Fdrag = (30.0 N?s/m)v?
A 50.0-kg block is being pulled up a 13.0° slope by a force of 250 N which is parallel to the slope. The coefficient of kinetic friction between the block and the slope is 0.200. What is the ac
A child pulls a 3.00-kg sled across level ground at constant velocity with a light rope that makes an angle 34.0° above horizontal. The tension in the rope is 5.00 N. Assuming the acceleration o
A 2kg mass is attached to a spring and you measure that the period of its oscillation is 2.36 seconds. What would you expect the period of oscillation to be if you doubled the mass attached to it?
At the 18th green of the U.S. Open you need to make a 22.0 ft putt to win the tournament. When you hit the ball, giving it an initial speed of 1.62 m/s, it stops 5.95 ft short of the hole. Assuming
Estimate the electric field strength (in magnitude and direction) at the mid-point of the molecule.
Question: A water chiller with a capacity of 150 tons of refrigeration cools 320GPM of water entering the chiller at 50F. at what temp does the water leave the chiller?
In a sodium chloride molecule the equilibrium separation of the Na+ and the Cl- ions is 0.24 nm. Assuming that the ions may be considered to be point charges of +q and -q respectively and that the
A race car moveson a circle of constant radius b. If the speed of the car varies with time t according to the equation v=ct, where c is a positive constant, show that the angle between the velocity
An electric dipole consists of charges +2e and -2e separated by 0.53 nm. It is in an electric field of strength 4.60 106 N/C. Calculate the magnitude of the torque on the dipole when the dipole mome
An ideal gas occupies a volume of 2.8-cm3 at 20°C and atmospheric pressure. Determine the number of molecules of gas in the container.
On a hot summer day in the state of Washington while kayaking, I saw several swimmers jump from a railroad bridge into the Snohomish River below. The swimmers stepped off the bridge, and they hit t
Two cars are traveling along a straight line in the same direction, the lead car at 24.0m/s and the other car at 29.3m/s. At the moment the cars are 38.3m apart, the lead driver applies the brakes,
The New River Gorge bridge in West Virginia is a 518 m long steel arch. How much will its length change between temperature extremes -15°C and 40°C?
You are driving through town at 13.5 m/s when suddenly a ball rolls out in front of you. You apply the brakes and begin decelerating at 3.31 m/s2. How far do you travel before stopping?
Two charges q1 = 4 µC, q2 = -23 µC, are L = 19 cm apart. A third charge is to be placed on the line between the two charges. How far from q1 should the third charge be placed so that th
An air bubble has a volume of 1.35 cm3 when it is released by a submarine 105 m below the surface of a lake. What is the volume of the bubble when it reaches the surface? Assume the temperature and