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The plane is released when it has been displaced 0.50 meter from its equilibrium position by the catapult. What is the approximate energy acquired by the airplane from the catapult during takeoff?
A uniform electric field of magnitude 250 V/m is directed in the positive x direction. A positive 12-μC charge moves from the origin to the point (x,y) = (20cm, 50cm). (a) What is the change in the
A simple Atwood's machine uses two masses, m1 and m2. Starting from rest, the speed of the two masses is 3.0 m/s at the end of 10.0 s. At that instant, the kinetic energy of the system is 100 J and
A series AC circuit contains the following components: a 150 resistor, an inductor of 250 mH, a capacitor of 2.00 , a source with = 210 V operating at 50.0 Hz. Calculate the (a) inductive reactance,
The small wheel has a radius of 2.4 and accelerates at the rate of 7.1 , and it is in contact with the pottery wheel (radius 20.0 ) without slipping. Find the angular acceleration of the pottery whe
On a clear day at a certain location, a 100-V/m vertical electric field exists near the earth surface. At the same place the earth's magnetic field has a magnitude of T. Compute the energy densities
A series RL circuit with L = 3.00 H and a series RC circuit with C = 3.00 F have equal time constants. If the two circuits contain the same resistances R, (a) what is the value of R and (b) what sit
A 44.9-N frictional force opposes the motion of the cart. (a) What is the magnitude of the force that the shopper exerts? Determine the work done by (b) the pushing force, (c) the frictional force,
A 2.00-H inductor carries a steady current of 0.500 A. when the switch in the circuit is opened, the current is effectively zero after 10.0 ms. what is the average induced emf in the inductor during
A coil of an area 0.100 is rotating at 60.0 rev/s with the axis of rotation perpendicular to a 0-200-T magnetic field. (a) If the coil has 1000 turns, what is the maximum emf generated in it? (b) Wh
The other end of the string is attached to a massless axel through the center of an orange sphere on a flat horizontal surface that rolls without slipping and has mass ms = 4.4 kg and radius Rs = 0
The armature of a simple ac generator has 50 circular loops of wire, each with a radius of 10 cm . It is rotated with a frequency of 60 Hz in a uniform magnetic field of 900 mT Part a: What is the m
A meteorologist for a TV station is using radar to determine the distance to a cloud. He notes that a time of 0.16 elapses between the sending and the return of a radar pulse.
The vertical component of the Earth's magnetic field at this location has a magnitude of 38.0 µT. What is the magnitude of the induced emf between the ends of the beam?
A wheel starts spinning from rest with uniform angular acceleration. If its angular speed at the end of the first 6.00 s is w then at the end of the first 12.0 s its angular speed will be
A loop of wire is perpendicular to a magnetic field. Rank, from greatest to least, the magnitudes of the loop's induced emf for each situation.
A 5 m deep river runs on a horizontal bridge, which is hung in air 10 m high above the ground. The pressure in the environment is 1 atm. (a)What is the normal force exerted upwards by the bridge? (b
A 50.0-N box is sliding on a rough horizontal floor, and the only horizontal force acting on it is friction. You observe that at one instant the box is sliding to the right at 1.75 m/s and that it s
An asteroid fragment wandering through space is often referred to as a meteoroid. When entering Earth's atmosphere some of the materials in the meteoroid chemically react with the gases in our atmos
Occasionally an asteroid is broken up into smaller pieces or fragments. These fragments hurl through space, and some of them even find their way to Earth. What mechanism would allow a fragment to le
An astronomical telescope has an objective lens with a focal length of 102cm and an eyepiece with a focal length of 18cm. When used to view and object that is far far away, such as a star, what is i
The charge per unit area on each plate has a magnitude of = 3.70 x 10-5 C/m2. The force on q1 due to q2 equals the force on q1 due to the electric field of the parallel plate capacitor. What is the
An electric toothbrush rests on a stand containing a 50-turn coil connected across the 120-V rms AC power line. Inside the brush handle is another coil whose induced current charges a 6-V battery. H
The solenoid coils are normally superconducting (zero resistance), but if superconductivity fails they revert to a resistance of 0.31 mΩ.
A 1.53 kg particle with velocity = (9.44 m/s) - (4.84 m/s) is at x = 1.03 m, y = 6.67 m. It is pulled by a 2.10 N force in the negative x direction. About the origin, what are (a) the particle's ang