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The only radiogenic lead isotope that is not either stable (Pb-206, 207, 208) or with a halflife of less than one day is Pb-210, which is found in nature
A liquid with a density of 1.37*10^3 kg/m^3 flows through two horizontal sections of tubing joined end to end.
At standard Temperature and pressure sound travels at speed u=330m/s relative to the air through which it propagates
You drive a car 7 hours at 46kmh then 7 hours at 69kmh. What is your average velocity? Answer in km/h.
In a race over a distance s, runner A starts from rest and accelerates at a1 for the first distance x and then runs at constant speed.
The frictional force is negligible. The block starts from rest and moves 11.0 m in 5.00 s.
A projectile is fired with an initial velocity of 15.0 m/s at 53.0o above the horizontal from the foot of a ramp inclined 20.0o above the horizontal.
Calculate the radius of curvature of the path of a beta particle of mass 9.1 x 10^-31 kg and speed 2.0 x 10^7 m/sec perpendicular to a magnetic field of 0.50 T.
Calculate the two velocities corresponding to the scaled displacements by dividing each displacement, actual, in meters by the image time interval, 1/30 s.
A theory of nuclear astrophysics is that all the heavy elements like uranium are formed in supernova explosions of massive stars
Select the three options which are NOT examples of quantities that could be modeled by exponential growth or decay.
A radioactive source has a half life of 74 days and an activity of 370 MBq. what was the activity 30 days ago?
A wheel starts from rest and rotates about its axis with constant angular acceleration.
An 85-kg jogger is heading due east at a speed of 2.0 m/s. A 55-kg jogger is heading 32° north of east at a speed of 3.0 m/s.
A source has a half-life of 12 hours and an initial activity of 10mCi. After 4 days what is its activity?
A force of magnitude 8.0 N pushes on a horizontally stacked set of blocks on a frictionless surface with masses m1 = 2.0 kg, m2 = 3.0 kg.
The half-life (the time required for the body to eliminate one-half of the total amount of caffeine) varies widely depending on factors such as
As the car accelerates away from a stoplight, in which direction does the balloon move relative to the car? Explain.
Perfluorooctane sulphonate (PFOS) is considered to be a persistent environmental pollutant, with a half life in natural water of approximately 41 years
For dioxins in fathead minnows, the BCF = 29,200. The half-life for elimination of dioxins from fathead minnows is 14.5 days.
Three radioactive sources each have activities of 1.0 micro Curies (Ci) at t=0. Their half lives are 1 sec, 1 hour and 1 day respectively
You are driving north on a highway. Then, without changing speed, you round a curve and drive east.
Describe the experimental evidence for wave-particle duality. State the uncertainty and correspondence principle.
Under the conditions of question 1, how far does the shell land past the edge of the cliff?
A drug that has an half life of 20 hours inside the human body and is administered intravenously (I.V.) into a patient.