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A moon rock is found to contain 500 g of 232Th and 100 g of 208Pb. Assuming that all of the lead has resulted from the decay of thorium and that the half-life for this process is 1.4x1010 years, calculate the age of the moon rock (i.e. how long ago since the thorium began to decay).
A plane diving with constant speed at an angle of 51.7° with the vertical, releases a package at an altitude of 437 m. The package hits the ground 2.93 s after release. How far horizontally does the package travel.
A photon has momentum of magnitude 8.15×10?28kg?m/s. What is the wavelength of this photon
What is the half life of the sample if the decay rate decay rate decreases from 175 KBq to 12.4kBq in 18 seconds
A single conservative force acts on a 5.30-kg particle within a system due to its interaction with the rest of the system. calculate the change in the potential energy of the system
Two point charges, Q = +5.17 microC and q = -2.83 microC, are separated by r = 5.85 m. What is the electric potential energy?
A typical power plant uses some fuel as the source of heat (QH) to drive a heat engine that does work (W) to drive a generator that is connected to the electrical grid. What is the efficiency and how do we express this in power
An alpha particle, which is a helium nucleus, has a mass of 6.64*10^-27 kg. It is travleing horizontally at 42.3 km/s when it enters a uniform, What is the diameter of the path followed by the alpha particle
assess the benefits brought about by the application of lean techniques at wiremold. explain your answer by describing
A 42.0 kg block of ice slides down the plane incline 34.0 degrees. Assuming friction is negligible, what is the acceleration of the block down the incline
A plane wave of wavelength 580 nm is incident on a slit with a width of a = 0.50 mm. A thin converging lens of focal length +80 cm is placed between the slit, How far is the screen from the lens
The process is claimed to produce 2000 J/min of work and to require an undisclosed amount of heat transfer with a heat reservoir at 300 K. Should inventor be issued a patent of this device.
A 2.8 kg rectangular air mattress is 2 m long, 0.5 m wide, and 0.1 m thick. What mass can it support in water before sinking.
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