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He finds that by pointing his canoe due east, and paddling at a constant speed of 2.0m/s relative to the water, he is able to reach the island in 42 seconds. Find the speed and direction of the curr
Find the time t required for the cannonball to reach the castle. State your answer in terms of v0, and d
A 0.919 kg particle has a speed of 6.5 m/s at point A and kinetic energy of 5.9J at point B. What is the total work done on the particle as it moves from point A to B?
The electric field strength is 50,000 N/C inside a parallel-plate capacitor with a 2.0mm spacing. A proton is released from rest at the positive plate. What is the proton's speed when it reaches the
A string is wrapped around a pulley that consists of a disc of mass 2 kg and radius 0.3 m. Hanging from the string is a mass m = 3 kg. What is the acceleration of the mass m?
A submarine dives to a depth of 302 feet in the ocean. What is the force (in pounds) acting on a hatch that has an area of 3.1 square feet?
(a) what is the resulting angular speed of the platform and (b) what is the ratio of the new kinetic energy of the system to the original kinetic energy?
A ball of mass 0.208 kg has a velocity of 1.41 i m/s; a ball of mass 0.305 kg has a velocity of -0.409 i m/s.They meet in a head-on elastic collision. (a) Find their velocities after the collision.
Suppose you wish to make a solenoid whose self-inductance is 1.0 mH. The inductor is to have a cross-sectional area of 1.80 x 10-3 m2 and a length of 0.053 m. How many turns of wire are needed?
A line of charge is formed to make a 5 cm x 5 cm square with a line charge of lamda and lies in the xy-plane. Find the electric potential V at a point P on the Z-axis.
An electron with kinetic energy 1.822 x 10-16 J enters a region with a uniform electric field of 12,000 N/C. The field points in the same direction as the electron's velocity. After the electron has
A 100.0 pF air-filled capacitor consists of two circular plates of radius 0.40 mm. How far apart are the plates?
What is the difference in path lengths from the two slits to the location of a fifth order bright fringe on the screen?
When we look at the magnetic force on a moving charged particle in a uniform magnetic field we see that the force does not change the particle's energy.
Runner A is initially 5.7 km west of a flagpole and is running with a constant velocity of 8.3 km/h due east. Runner B is initially 4.9 km east of the flagpole and is running with a constant velocit
Two Formula One racing cars are negotiating a circular turn, and they have the same centripetal accelaration. However, the path of car A has a radius of 48m , while that of car B is 36 m. a. Determ
A 100 W lightbulb generates 94 W of heat, which is dissipated through a glass bulb that has a radius of 2.8 cm and is 0.9 mm thick. What is the difference in temperature between the inner and outer
If the motorcycle travels over the crest at half speed found in Part A, find the ratio between the apparent weight of the motorcycle and its rider and their true weight.
When a 45 N force is applied tangentially to the disk, perpendicular to the radius, the disk acquires an angular acceleratrion of 80 rad/s^2. What is the mass of the disk?
The motion of the electron can be seen as a circular current and so we can compute the magnetic moment (dipole) of the electron. If we define the current as e/T, where T is the period. Determine the
A block of mass 2.15 kg slides at a speed 4.05 m/s along a horizontal smooth table. It next slides down a smooth ramp, descending a height 88.0 cm. find the speed of the block at the bottom of the r
Now the problem is similar to a current in a ring, and this current generates a magnetic field. What is the magnetic field seen by the nucleous?
A 3.0 pF air capacitor consists of two parallel plates that have surface charge densities of 1.0 nC/mm2. If the potential between the plates is 23.0 kV, find the area of one plate.
When a solid cylindrical rod is connected across a fixed potential difference, a current I flows through the rod.