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Calculate the magnitude of the magnetic force on the wire if the angle between the magnetic field and the current is (a) 60.0°, (b) 90.0°, (c) 120°.
Two blocks each of mass 1.7 kg are suspended from the ends of a rigid weightless rod of length l1 = 171.0 cm and l2 = 12.2 cm. The rod is held in the horizontal position shown and then released. Cal
The altitude of a hang glider is incrasing at a rate of 6.8 m/s. At the same time, the shadow of the glider moves along the ground at a speed of 15.5m/s when the sun is directly over head. Find the
A long horizontal wire carries a current of 48 {rm A}. A second wire, made of 2.6 mm diameter copper wire and parallel to the first, is kept in suspension magnetically 15 {rm cm} below. Determine th
A proton orbits a long charged wire, making 1.50 times 10^{6} revolutions per second. The radius of the orbit is 1.60 cm. What is the wire's linear charge density?
A 202-kg projectile, fired with a speed of 123 m/s at a 53.0 angle, breaks into three pieces of equal mass at the highest point of its arc (where its velocity is horizontal).
When solving this problem use an inertial coordinate system, as drawn here. (Intro 2 figure) Given the angular speed omega, find the radius R(omega) at which the mass rotates without moving toward
A small glass bead has been charged to + 10.0 nC. A metal ball bearing 1.90 cm above the bead feels a 1.20×10-2 N downward electric force. What is the charge on the ball bearing?
An electric field of intensity 2.5 kN/C is applied along the x-axis. Calculate the electric flux through a rectangular plane 0.350 m wide and 0.700 m long if the following conditions are true:
A 63-kg person on skis is going down a hill sloped at 30° from the horizontal. The coefficient of friction between the skis and the snow is 0.19. What would be the magnitude of the acceleration
A tennis ball rolls off the edge of a tabletop of height 0.850 m above the floor and strikes the floor at a point a horizontal distance 1.80 m from the edge of the table. You can ignore air resistan
The block starts at rest, is accelerated by the compression spring, and slides across a frictionless track except for a small rough area on a horizontal section ofthe track. It leaves the track hori
Two horizontal forces, 213 N and 140 N, are exerted on a canoe. If the these forces are applied in the same directions, find the net horizontal force on the crate.
A 3.5 kg rock is initially at rest at the top of a cli?. Assume that the rock falls into the sea at the foot of the cli? and that its kinetic energy is transferred entirely to the water. How high is
Assume that the angles that locate the fringesb on the screen are small enough so that sin u<tan u. Find the separation of y when the light has a wavelength of 585nm.
A 0.630-kg ball is dropped from rest at a point 1.55 m above the floor. The ball rebounds straight upward to a height of 0.770 m. What are the magnitude and direction of the impulse of the net force
Four identical particles each have charge q and mass m. They are released from rest at the vertices of a square of side L. How fast is each charge moving when their distance from the center of the
A canoe has a velocity of .4m/s south east relative to the earth. The canoe is on a river that is flowing .5m/s east relative to the earth. find the velocity of canoe relative to river?
Suppose the charge at the center is now increased to +9Q, while the charge at the surface of the conductor is changed to -13Q. Find the electric field interior to the sphere in the region r < a.
A 5.0-cm-thick layer of oil is sandwiched between a 1.0-cm-thick sheet of glass and a 2.0-cm-thick sheet of polystyrene plastic. How long (in ns) does it take light incident perpendicular to the gl
What is the wavelength of light whose first-order maxima will be 17.4 {rm cm} from the central maximum on the screen?
A car travels along a horizontal curved road that has a radius of 600 m. If the speed is uniformly increased at a rate of 2000 km/h2, determine the magnitude of the acceleration at the instant the
Draw a free body diagram of the ladder. (b) Find the normal forces that the wall and the floor exert on the ladder. (c) What is the friction force on the ladder at the floor?
After being struck by the stone, the boat's velocity is 1.9 m/s, due east. What is the mass of the boat? Assume the water offers no resistance to the boat's motion.
Calculate the energy of the electron in the ground state of single ionized helium, which has an atomic number Z =2.