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What is the de Broglie wavelength (in angstrom) of an electron at 100 eV? What is the wavelength for electrons at 12 keV, which is typical of electron microscopes? Comparing this to visible light comment on the advantages of electron microscopes.
Differentiate this equation, q=qpcosωt to find the current in the LC circuit, and use q=CV to find the voltage. From these obtain the magnetic energy in the inductor and the electric energy in the capacitor, and sum to show that the total energy rema..
A 5.00 g bullet traveling horizontally at 460 m/s is shot through a 2.00 kg wood block suspended on a string 3.00 m long. find the speed of the bullet as it emerges from the block
a quarterback can throw a receiver a high lazy lob pass or a low quick bullet pass. these passes are indicated by
a copper calorimeter can with mass 0.100kg contains 0.160kg of water and 0.018kg of ice in thermal equilibrium at
Suppose a force F(t)=3.00N/S^2 t^2 - 2.00 Nis exerted on an object with a mass of 20.0 grams and an initial velocity of50.0 m/s, in the positive x direction. Use the impulse-momentum theorem to find the object’s velocity after 2.00 s.
Amateur radio operators often refer to their radio waves by wavelength. What are the estimated frequencies of the 160-m, 15-m, and 2-m wavelength amateur radio bands?
on a frictionless horizontal air table puck a with mass 0.250 kg is moving toward puck b with mass 0.370 kg which is
A certain substance has a mass per mole of 42 g/mol. When 313 Jis added as heat to a 25.0 g sample ofthis material, How many moles of the substance are present
Hydraulic engineers often use, as a unit of volume of water, the "acre-foot", defined as the volume of water that will cover 1 acre of land to a depth of 1 ft. A severe thunderstorm dumps 3.0 in. of rain in 30 min on a town of area 30 km2. What vo..
The drawing shows the potential at five points on a set of axes. find the magnitude of the electric field in the vicinity of the origin
Blood from two different patients is to be tested by having it glow through a long straight tube of length 10 cm and internal diameter 6 mm. A pressure drop of 50 dynes/cm2 is imposed from one end of the tube
Assume that a gold nucleus has a radius of 6.23 fm and analpha particle has a radius of 1.80 fm. What energy must an incident alpha particle have in order to "touch" the gold nucleus
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