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A certain radioisotope has a half-life of 7.45 days. What percentage of an initial sample of this isotope remains after 23 days?
You throw a 20-N rock vertically into the air from ground level. You observe that when it is a height 14.5m above the ground, Use the work-energy theorem to find its maximum height
An x-ray photon of initial energy 50.0 keV Compton scatters from an electron that is initially at rest. find the wavelength of the back-scattered photon
A dipole is located at the origin, and is composed of charged particles with charge +e and -e, separated by a distance 3 10-10 m along the y axis. The +e charge is on the -y axis.
An inexpensive depth gauge used by scuba divers consists of a small diameter tube wrapped around the rim of a dial. An opening or port at one end allows water to enter when submerged.
An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. But she does have devices to measure distance and time accurately. What is the mass of this canister
A uniform ladder 10.0 m long is leaning against a frictionless wall at an angle of 60.0° above the horizontal. compute the magnitude of the frictional force exerted on the ladder
An electric dipole consisting of charges of magnitude 3.90 nC separated by 7.10µm is in an electric field of strength 1350 N/C. What is the magnitude of the electricdipole moment?
in a ski race starting from rest a 65kg skier descends through 120 meters of vertical drop nd finishes his run at 58 miles per hour. how much work is done by the skier
An object 1.00" high is placed 2.00" in front of a concave mirro f radius 4.00" Find p and q. Show work/picture. Locate and describe the image
The 1800-turn coil in a dc motor has an area per turn of 1.1 multiply.gif 10-2 m2. compute the current in the coil
A sample containing beryllium (atomic mass 9 u), aluminum (27 u), and an unknown element is placed in a mass spectrometer, What is the mass of the unknown element
Two cylindrical rods are identical, except that one has a thermal conductivity k1 and the other has a thermal conductivity k2. As the drawing shows.
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