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If a proton is moving in a magnetic field with a speed of 4 × 106 m/s and is executing uniform circular motion with a radius of 10 cm, what is the magnetic field?
An electron with a velocity of v= (3x+ 4y+ 2z) × 106 m/s enters a region where there is both a magnetic field and an electric field. The magnetic field is B = (1x- 2y+ 4z)T. If the electron e
What is the acceleratin of the box? What was the total work done on the box? What is the final velocity? ( use work-energy theorem)
A mass of 10 kg was hung vertically from a spring. The system obtain equilibrium with a stretched length of 30 cm. a) What was the spring constant of this spring?
The coffcient of kinetic friction between the block and the incline is 0.1. The block is initially at rest. What is the kinetic energy of the block after it has been displaced 2 m along the incline?
Calculate the current induced in the ring if the ring has a resistance of 0.050 Ω during the quench. You may assume that the ring is oriented so that the field goes perpendicular to the plane of
Calculate the force on that wire if the magnetic field of the Earth is 6.0*10-5 T. You may assume that the magnetic field is perpendicular to the wire.
An electron is accelerated through an electric potential of 267 V, then enters a 37 Gauss magnetic field in a direction at a right angle to the velocity. Find the radius in cm of the subsequent circ
Find the magnetic field strength (in Gauss) for a current of 3.7 A in the Helmholtz coils with 147 turn, assuming a coil radius of 15 cm.Express the answer with one decimal place.
A soldering iron uses an electric current in a wire to heat the tip. A transformer with 100 turns on the secondary coil provides 49W at an rms voltage of 26V. What is the resistance of the wire in t
At a certain instant before the carts collide, the first cart's velocity is +5.2 m/s, and the second cart's velocity is -2.2 m/s. (a) What is the total momentum of the system of the two carts at thi
The mass of the roller is 2.5 kg; and its radius is 4.0 cm. Ignoring the mass of the handle of the roller, what is the magnitude of the tangential acceleration of the roller?
Water is then isothermally compressed at 1.5 bar to state 4 and then via adiabatic compression back to state 1. (a) Determine the heat transfer (kJ) and work (kJ) for each process.
A cart starts from rest at the top of the tilted track. Assume the track is frictionless. The cart passes photogate A moving at speed3.4cm/s, and passes photogate B moving at speed 8.6cm/s. The dis
In a Newton's rings demonstration using 540-nm light, the distance from the center of the rings to the first bright ring is 0.30 mm. If the bottom piece of glass is flat, what's the curvature radius
A 2.6-kg shere of radius 35cm is intially rolling on a flat surface with a speed of v=.40 m/s. It comes to rest in 80m. Determine the force F and the distance I.
Calculate the rate at which body heat flows out through the clothing of a skier, given the following data. The body surface area is 1.8 m2 and the clothing is 1.0 cm thick; skin surface temperature
A rotating wheel requires 7.00s to rotate 26.0revolutions. Its angular velocity at the end of the 7.00-s interval is99.0rad/s. What is the constant angular acceleration (in rad/s) of the wheel?
A centrifuge in a medical laboratory rotates at an angular speed of 3,500 rev/min. When switched off, it rotates through54.0revolutions before coming to rest. Find the constant angular acceleration
Find (a) the speed of the proton as it enters the region of magnetic field and (b) the radius of the circular path on which the proton moves in the magnetic field.
A copper rod 0.150 m long and with a mass of 0.0500 kg is suspended from two thin, flexible wires. At right angles to the rod is a uniform magnetic field of 0.550 T pointing into the page. Find (a)
A proton is released from rest at the positive plate of a parallel plate capacitor. It crosses the capacitor and reaches the negative plate with a speed of 50,000 m/s/ What will be the final speed
A solenoid is wound with a single layer of insulated copper wire of diameter 2.500 mm and has a diameter of 3.000 cm and is 1.100 m long. Assume that adjacent wires touch and that insulation thickne
An average human DNA molecule contains 5 x 108 base-pairs, each of which could be regarded as a "rung" on the DNA "ladder", and there are four types of base-pairs. If each base-pair were a random c
A person fishing from a pier observes thatsevenwave crests pass by in 6.2s and estimates the distance between two successive crests to be 3.2m.The timing starts with the first crest and ends with th