Physics, 22.08.2019 16:10 tiannacorreastamas

An ancient club is found that contains 200 g of pure carbon and has an activity of 7.5 decays per second. determine its age assuming that in living trees the ratio of ( 14 c 12 c ) ( 14 c 12 c ) atoms is about 1.10 × 10 − 12 1.10 × 10 − 12 . note that the half life of carbon-14 is 5700 years and the avogadro number is 6.02 × 10 23 6.02 × 10 23 .

Answers: 1

Show answers

Another question on Physics

Physics, 22.06.2019 04:10

Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward

Answers: 3

Answer

Physics, 22.06.2019 11:50

The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r × f) · n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, −5, 4] n, r = [−3, 5, 2] m, and n = [6, 5, −7].

Answers: 3

Answer

Physics, 23.06.2019 05:30

Oxygen gas enters well-insulated diffuser at 25 lbf/in.2, 420r, with a velocity of 860 ft/s through a flow area of 1.6 in.^2. at the exit, the flow area is 12 times the inlet area, and the velocity is 19 ft/s. the potential energy change from inlet to exit is negligible. assuming ideal gas behavior for the oxygen and steady-state operation of the diffuser, determine the following: (a) the exit temperature, in r(b) the exit pressure, in lbf/in.^2 (c) the mass flow rate, in lb/s

Answers: 3

Answer

Physics, 23.06.2019 07:00

What is the period of a wave traveling 5 m/s if its wavelength is 20 m/s

Answers: 2

Answer

You know the right answer?

An ancient club is found that contains 200 g of pure carbon and has an activity of 7.5 decays per se...

Questions