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The half-life of a particular atom is 4.56 minutes. Determine the ratio of material left to the original amount after:
a. 6.50 minutes,
b. 12.8 minutes.
c. What is the decay constant and mean lifetime for this material?
One can not align the apparatus to eliminate entirely the effects of the Earth's magnetic field. calculate the component of the earth magnetic field perpendicular to the entering electron beam
Elm Street has a pronounced dip at the bottom of a steep hill before going back uphill on the other side. Sitting on the scale while the car is parked gives a reading of 588 N. Analyze your data, using a graph, to determine the dip's radius of curv..
A sphere of radius r starts from rest and rolls without slipping along a curved surface, dropping through a vertical distance of 0.303 m. Find the final speed v of the sphere's center of mass
A circular coil of wire 8.40cm in diameter has 16.0 turns and carries a current of 2.60A . The coil is in a region where the magnetic field is 0.580 T, What is this maximum torque in part (A)
An ice chest at a beach party contains 12 cans of soda at 2.41°C. Each can of soda has a mass of 0.35 kg and a specific heat capacity of 3800 J/(kg C°). Someone adds a 9.97-kg watermelon at 23.5 °C to the chest.
a car decelerates uniformly and comes to a stop after 10 s. the cars average velocity during deceleration was 50 kmh.
you must determine the acceleration of a rocket so that its equipment can be designed to survive. the rocket will have a burne time of t=30 second, what is maximum altitude of the rocket
A small 1.85-GBq 198Au source (maximum beta-particle energy0.961 MeV, average 0.315 MeV) is enclosed in a lead shield justthick enough to absorb all the beta particles. a) Estimate the energy ?uence rate due to bremsstrahlung ata point 50 cm away.
a 75kg astronaut is holding a 5kg ball while in deepspace. he wants to use the ball to travel backwards towards his
On a frictionless, horizontal air table, puck A (with mass 0.250 ) is moving toward puck B (with mass 0.350 ), Calculate the change in the total kinetic energy of the system that occurs during the collision
a particle of mass 0.350 kg is attached to the 100 cm mark of a meter stick of mass 0.150 kg. the meter stick rotates
A balloon of volume 2.7 m^3 contains argon gas at a pressure of 2.4 10^5 Pa and room temperature (20°C). What is the total internal energy of the gas?
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