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An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner's 2.00-T field with his fingers pointing in the direction of the field.
(a) Find the average emf induced in his wedding ring, given its diameter is 2.15 cm and assuming it takes 0.249 s to move it into the field.
mV
(b) If the resistance of the ring is 1.00 m?, how much heat will be transferred to the ring during this time?
mJ
An Australian emu is running due east in a straight line at a speed of 12.5 m/s and slows down to a speed of 11.4 m/s in 7.3 s. (a) What is the direction of the bird's acceleration? north south east west.
A small glass bead has been charged to +30.0nC. A metal ball bearing 1.30cm above the bead feels a 1.90×10?2N downward electric force. What is the charge on the ball bearing?
A fluid in an insulated, flexible bottle is heated by a high resistance wire and expands. If 9kJ of heat is applied to the system and it does 5kJ of work, how much does the internal energy change?
A biology student uses a simple magnifier to examine the structural features of an insect's wing. The wing is held 3.60 cm in front of the lens, What angular magnification is achieved
X rays of wavelength 0.0196 nm are directed in the positive direction of an x axis onto a target containing loosely bound electrons. determine the corresponding change in photon energy
An aerosol can of whipped cream is pressurized at 440kPa when it's refrigerated at 3 C. The can warns against temperature in excess of 50 C. What is the safest pressure for the can .
An object is oscilliating on a spring with a period of 4.60 s . At time t= 0.00 s the object has zero speed and is at x = 8.30 cm . What is the acceleration of the object at t= 2.50 s ?
A spherical balloon of volume 4.03 x10^3 cm3 contains helium at the pressure of 1.15 x10^5 Pa. How various moles of helium are in the balloon if the average kinetic energy of the helium atoms is 3.60 x10-22 J.
The lowest pedal note on a large pipe organ has a fundamental frequency of 16 Hz, What is the length of the open-closed pipe that makes that note
A potter's wheel having a radius 0.55m and a moment of inertia 12kg•m2 is rotating freely at 51 rev/min. The potter can stop the wheel in 7 s by pressing a wet rag against the rim and exerting a radially inward force of 67N. Find out the effectual co..
What is the stopping distance of the car. What is the initial (horizontal) velocity of the ball.
lens forms an image of an object. The object is 16.0 cm from the lens, What is the focal length of the lens? Is the lens converging or diverging
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