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Technetium-99 is a radioactive isotope with a half-life of 6 hours that is used in bone scans and other medical tests, decaying by gamma-ray emission. A hospital technician prepares a sample of technetium-99 12 hours before its use.
Illustrate what are the possible weaknesses in the Kimberely Process? Illustrate what role do you think the three sectors will have in addressing these weaknesses?
An inclined plane of angle ? has a spring of force constant k fastened securely at the bottom so that the spring is parallel to the surface. A block of mass m is placed on the plane at a distance d from the spring.
An electronic flash unit for a camera contains a capacitor with a capacitance of 810 µF. Find the energy stored in the "charged-up" flash unit
A beam of unpolarized light shines on a stack of five ideal polarizers, Find the angle between the axes of each pair of adjacent polarizers
A doppler blood flow unit emits ultrasound at 5.0 MHz. What is the frequency shift of the ultrasound reflected form blood moving in an artery at a speed of 0.20 m/s?
When an 81.0 kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.10 x 10^3 J. By how much does the potential energy of a(n) 20 kg child increase when the child climbs a norma..
The wave the tamer creates in the whip has an amplitude of 0.086 m, a wavelength of 0.071 m, and a speed of 97 m/s. How much power does the wave transmit? The answer in W.
The electric starter in an automobile equipped with a 12 V battery draws a current of 80.00 A when in operation. Assume it takes the motor 2.90 s to start the engine. What amount of electric energy has been withdrawn from the battery?
A rescue helicopter lifts a 75 kilogram person straight up by means of a cable. Determine how much work is done by the person's weight
A sound wave traveling in air at 73°C has a frequency of 776 Hertz. Compute what the wavelength
question a golf ball strikes a hard smooth floor at an angle of ? 32.4deg and rebounds at the same angle. the mass of
The electromagnetic wave used in a microwave oven have a wavelength of about 12.228 cm. What is the frequency of the radiation
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