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In 1898, Pierre & Marie Curie isolated about 10mg of radium-226 from eight tons of uranium ore. If this sample had been placed in a museum
(a) how much of the radium would remain in the year 2109?
(b) How many radium nuclei would have decayed during this time?
In order to overcome a surface tension of a liquid, a force of1.32x10-2N is required to lift a wire ring ofcircumference 12.0cm. What is the surface tension of the liquid?
A infinitely long metal pipe of square cross section, with side length a, has two of its side that are opposite each other held at a constant potential V_0. The remaining two sides, that are also opposite each other, are grounded. Find the potential ..
Two blocks, each of mass m = 1.4 kg, are pushed along the horizontal surface of a table by a horizontal force P of magnitude 4.7 N, Find the frictional force acting on the upper block
A cyinder with a moving piston contains 0.05m^3 of gass at the temperature of 20c and prassure 100kpa. what is the new volume of the gass
You have a 77.7-cm-long copper rod with a rectangular cross section of dimensions 5.75 cm by 8.13 cm. Find the heat current through the rod
As measured in Earth's frame of reference, two planets are 485,000 km apart. How fast is the ship traveling
a mechanism on earth used to shoot down geosyn- chronous satellites that house laser-based weapons is finally perfected
The potential difference between two points in a wire 10 m apart is 12 V. When the current density is 4*10^7 A/m^2. find the resistivity of the material in the wire
A 51.0 kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 235 N. What is the final speed of the crate after being pulled these 22.5 m
Ultraviolet light is shone on a particular metal and the stopping potential is measured at the same time. What is the work function of the metal
A steel beam 10m long is installed in a structure at20oC. What are the beam's changes in length at thetemperature extremes of -30oC to45oC
A crate of mass 9.4 kg is pulled up a rough incline with an initial speed of 1.46 m/s. The pulling force is 94 N parallel to the incline, which makes an angle of 20.2° with the horizontal. The coefficient of kinetic friction is 0.400, and the crat..
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