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Two hand-held radio transceivers with dipole antennas are separated by a large, fixed distance. Assuming a vertical transmitting antenna, what fraction of the maximum receiving power will occur in t
A spherical drop of water carrying a charge of 20 pC has a potential of 530 V at its surface (with V = 0 at infinity). (a) What is the radius of the drop?
As a space shuttle moves through the dilute ionized gas of Earth's ionosphere, the shuttle's potential is typically changed by -2.9 V during one revolution. By assuming that the shuttle is a sphere
Two large, parallel, conducting plates are 21 cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electrostatic force of 3.2 x 10-15 N acts on an electron pla
A classical system of N distinguishable non-interacting particles of mass m is placed in a three dimentional harmonic well : U(r) = (X2 + y2 + Z2 )/2V2/3 . Find:
What is the minimum height you would have to place a solid ball of mass M and radius R (I = 2MR2 / 5) on a hill in order for the ball to make it completely around a circular loop at the bottom of th
How many times a minute will they spin together if the record player base and the record stick together (assume there is no slipping when the record lands on the base)? Remember, for a solid disk or
A 1.60*10^3 kg car rounds a circular turn of radius 22.0 m. If the road is flat and the coefficient of static friction between the tires and the road is 0.7, how fast can the car go without skidding
An airplane is flying in a horizontal circle at a speed of 122 m/s. The 80.0 kg pilot does not want his centripetal acceleration to exceed 6.00 times free-fall acceleration.
A supertanker with the mass of 8.92 × 109 kg is moving with a constant velocity. Its engines generate a forward thrust of 2.05 × 105 N. Determine (a) the magnitude of the resistive force e
A car zooms around a curve (radius = 20 m) at a speed of 20 m/s. a. What is the centripetal acceleration of the car?
If a +1 micro-coulomb charge is next to a +4 micro-coulomb charge, the magnitude of the repulsive force on the +1 micro-coulomb charge is the same for both particles right?
If a neutral metal sphere is connected to ground through a wire, when a positively charged glass rod comes close to the sphere, electrons are attracted to the positively charged glass rod. When the
Car A and Car B are in a crash. Car A has a total mass of 274 kg, while car B has a total mass of 272 kg. The coefficient of restitution for a collision between two cars is 0.85.
How far down the road from the initial point that they passed each other will the cop catch the car?
A pendulum bob of length L has its motion interrupted by a peg vertically beneath the support. The bob is released when the string is horizontal. Find the minimum value for y in order for the bob to
A new planet which has ten times the mass of the Earth and four times the radius. a) What is the acceleration due to gravity on this planet?
If the ball is kicked at 45 degrees above the horizontal, what must its initial speed be if it is to just clear the bar. Express the answer in m/s and km/hr.
A locomotive of mass 21X10^3 kg travelling at 2.0m/s runs into an identical stationary locomotive.
What minimum coefficient of friction is necessary between the wall and the riders in order for there to be no tendency to slide down the wall?
A ball starts from rest and rolls down a hill with uniform acceleration, traveling 150 m during the second 5.0 s of its motion. How far did it roll during the first 5.0 s of motion?
A dolphin leaps out of the water at an angle of 23.3 ° above the horizontal. The horizontal component of the dolphin's velocity is 5.94 m/s. Find the magnitude of the vertical component of the v
A crate weighing 6.90 103 N is pulled up a 37° incline by a force parallel to the plane. If the coefficient of kinetic friction between the crate and the surface of the plane is 0.750, what is t
What is the change in its potential energy by the time it reaches the top of its trajectory?
Determine the pilot's mass and the reading on the scale when she is halfway up the front of the circle, at the very top of the circle and at the bottom of the circle. Include free body diagrams.