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A) Explain radioactivity in terms of an unstable nucleus.
b) What are the differences between alpha particles, beta particles, and gamma rays?
c) Fluorine-18 has a half-life of 110 min. If 200 mg of fluorine-18 is stored at 6:30 am, how many mg of the isotope is till active at noon?
d) Indicate whether the following represent fission, fusion, or both:
i) Very high temperatures are required to initiate the reaction
ii) Lesser quantity of radioactive waste is generated
iii) Large amounts of energy are released.
A rectangular loop of 250 turns is 33cm wide and 17cm high. What is the current in this loop
A guitar string is 108 cm long and has a mass of 3.4 g. From the bridge to the support post (L) is 70 cm, What is the frequency of the first overtone
A large man sits on a four-legged chair with his feet off the floor. The combined mass of the man and chair is 95.0 kg. what pressure does each leg exert on the floor
a 2800 kg space vehicle initially at rest falls vertically from a height of 3000 km above the earths surface.determine
A car accelerates uniformly from rest and reaches a speed of 23.7 m/s in 8.43 s. The diameter of a tire on this car is 51.9 cm. What is the final angular speed of a tire in revolutions per second
A 1.0-kg standard cart A collides with a 0.10-kgcart B. The x component of the velocity of cart A is +0.70m/s before the collision and +0.50m/s after the collision. What is the x component of the change in the momentum of A
In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 530 nm. What is the work function of this material?
sound waves with frequency 2700 hz and speed 343 ms diffract through the rectangular opening of a speaker cabinet and
an experiment youre designing needs a gas with ? 1.45. you recall from your physics class that no individual gas has
A 820 kg- sports car collides into the rear end of a 2700 kg- SUV stopped at a red light. calculates the speed of the sports car at impact
A current of 2.5 a runs through 20 circular wire loops of diameter 10 cm. What is the magnetic field magnitude and direction at the center of the loops? (Show the derivation of any formula that you use.)
A 110 kg mail bag hangs by a vertical rope 4.0 m long. A postal worker then displaces the bag to a position 2.0 m sideways from its original position, always keeping the rope taut. As the bag is moved to this position, how much work is completed by t..
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