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A wooden artifact is found in an ancient tomb. Its 14C activity is measured to be 73.6% of that in a fresh sample of wood from the same region. Assuming the same amount of 14C was initially presented in the wood from which the artifact was made, determine the age of the artifact. The half-life of 14C is 5730 y. Answer in units of y.
A 0.03 kg bullet hits asteel plate and melts and splatters on impact. Assuming thatthe bullet recieves 80% of the collision energy, at what minimium speed must it travel to melt on impact?
A tennis player hits a 1.45 kg tennis ball with a racket of mass 2.5 kg. what impulse did he imply on the ball
A fire helicopter carries a 649 kg bucket of water at the end of a 18.7 m long cable. Flying back from a fire at a constant speed of 44.2 m/s, Determine the force of air resistance on the bucket
A circular coil of 30 turns and radius 11.3cm surrounds a long solenoid of radius 2.7cm and 1.00x103 turns per meter. What is in Webers, the flux through the coil
An ideal gas is enclosed in a cylinder that has a moveable pistonon top. The piston has a mass of 3900 gand an area of 7.00 cm2 and isfree to slide up and down, keeping the pressure of the gasconstant. How much work is done on the gas as the temperat..
Automobiles A and B are traveling in adjacent highway lanes and at t = 0 have the positions and speeds shown. Knowing that automobile A has a constant acceleration of 0.6 m/s2 and that B has a constant deceleration of 0.4 m/s2, determine
A 33.8-kg child runs with a speed of 2.80 m/s tangential to the rim of a stationary merry-go-round. Calculate both the initial and the final kinetic energy of the system
A sample of wood from an archaeological excavation is dated by using a mass spectrometer to measure the fraction of 14C atoms. What is the wood's age
q1.the density of the tightly compressed sugar cube is about 1.4 1.4gml. if a sugar cube weighs very close to 5 grams
A 5.40 105 H solenoid is constructed by wrapping 65 turns of wire around a cylinder with a cross-sectional area of 9.0 104 m2. When the solenoid is shortened by squeezing the turns closer together, the inductance increases to 8.60 105 H. Det..
A rock is dropped from a tree of height 21 m into a lake (depth 5.2 m) below. What is the total elapsed time
Find the change in momentum of a 1380 kg car that increases its speed from 6.0 m/s to 16.0 m/s in a time of 16 s while traveling in the same direction? Express your answer to two significant figures and include the appropriate units. What minimum for..
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