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The glow-in-the-dark dials on some watches and some keychain lights shine with energy provided by the decay of radioactive tritium, 3^1H. Tritium is a radioactive isotope of hydrogen with a half-life of 12 years. Each decay emits an electron with an energy of 19 KeV. A typical new watch has tritium with a total activity of 21MBq.Part A What is the speed of the emitted electron? (This speed is high enough that youâ€TMll need to do a relativistic calculation.) include units
Part B What is the power, in watts, provided by the radioactive decay process? include units
Part C What will be the activity of the tritium in a watch after 7 years, assuming none escapes?
A diver springs upward from a board that is 3.15 meters above the water. Determine her initial speed as she leaves the board
Did you firm earn profit or incurred loss at the end and make a small comment on your financial position at the end.
Consider a weathered rock or soil particle lying on a slope. How would the gravitational force pulling the particle downward along the land surface vary with the inclination of the slope.
A satellite is put in a circular orbit about Earth with a radius equal to 45% of the radius of the Moon's orbit. What is its period of revolution in lunar months
A person has a near point of NP = 85 cm and a far point of FP = 210 cm. Write a formula for the power, P1, of the upper portion of the bifocals, in terms of the given quantities, that will enable the person to see distant objects clearly
one solenoid is centered inside another. the outer one has a length of 45.0 cm and contains 6800 coils, what is the EMF induced in the inner solenoid
A large wheel starts from rest and has a constant angular acceleration of 3.5 radians/second^2. Determine the total angular displacement of the wheel during this motion
How fast is the roller coaster moving at the top of the loop
A jet with mass m = 1.3 × 105 kg jet accelerates down the runway for takeoff at 2.4 m/s2, What is the net vertical force on the airplane as it levels off
a uniform 12.0kg ladder is 4.0m long and is placed against a frictionless wall at 30 degress. find the frictionless force at the floor necessary to maintaain equilibrium
a 753 kg elevator starts from rest. it moves upward for 3.04 seconds with a constant acceleration until it reaches its cruising speed of 2.07 m/s
An electric dipole is formed from +/-4.0 nC point charges spaced 3mm apart. The dipole is cantered at the origin, oriented along the y-axis. What is an electric field strength at point (x,y) = ( 6.0 cm, 0 cm)
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