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De Broglie postulated that the relationship ? = h/p is valid for relativistic particles. What is the de Broglie wavelength for a (relativistic) electron
Two particles with masses 2m and 6m are moving toward each other along the x axis with the same initial speeds vi. Find the final speeds of the particles
A 0.170 kg tumour is being irradiated by a radioactive source. Each decay of the radioactive source produces a particle with an energy of 0.450 MeV. find the activity of the radioactive source
A reading on a Geiger counter of 0.23 mrad/h is based on assuming that the measured radiation is due to cesium-137, How many ?-rays does the person's body absorb every second
A farsighted person uses glasses with a refractive power of 3.6 diopters. What is this person's near point when not wearing glasses
A girl with a mass of 60kg springs from a trampoline with an initial upward velocity of 8.0 m/s. what is the maximum height that the girl (with box) reaches
An unfortunate subject receives doses of the following types of radiation: ? rays (20 mrad, RBE=1), electrons (45 mrad, RBE=1), What is the total biologically equivalent dose received
A girl of m1=60 kg springs from a trampoline with an initial upward velocity of Vi=8.0 m/s. what is the speed of the girl immediately before she grabs the box
A 1.8 cm high object is placed 30 cm from a concave mirror with radius of curvature 30 cm. Determine the object's image size
A combustion devise was used to determine the empirical formula for a compound that only contains C, H, and O. A 0.6349 g sample of the unknown produced
the half-life of a muon at rest is 1.52 us. One can store muons for a much longer time by accelerating them to a speed very close to that of light, How fast will the muons have to be moving
From the time the mass of the flask is first measured until the time it is finally measured, it is handled a number of times with oily fingers. Does this lack of proper technique result in the molar
A 900- kg car collides with a 1300- kg car that was initially at rest at the origin of an x-y coordinate system. What was the initial speed of the lighter car (in km/h)
A spaceship leaves earth (Event A), travels to pluto (which is 5.0 h away at the time), and then returns (Event B) exactly 11.0 h later. estimate the time measured between events A and B by the ship'
The mass of the flask (before the sample is placed into the flask) is measured when the outside of the flask is wet. However, the outside of the flask is dried before its mass is measured.
How many grams of carbon dioxide are produced from the burning of 1,368 g of sucrose (C12H22O11) according to the following equation
Atom A loses 1 electron and atom B gains 2 electrons. What formula results if these two ions combine to produce a neutral compound
A cyclist rides a bike at 12.0 miles/hour. The diameter of the wheels is 70.0cm. (a) Through how many turns do the wheels spin for the 12.0mile trip, what is the bikes angular acceleration
A Breathalyzer instrument contains two ampules, each of which contains 0.75 mg K2Cr2O7 dissolved in 3 mL of 9 mol L^-1 H2SO4(aq). One of the ampules is used as reference. When a person exhales into
A convex lens with f1= 20.3cm is mounted 39.5cm to the left of a concave lens. When an object is placed 29.4cm to the left of the convex lens, What is the focal length f2 of the concave lens
You are given a four-wheeled cart of mass 19 kg, where the distance between a wheel and its nearest neighbors is 1.7 m. Find the weight on the nearer wheels of the cart under this load
Write a balanced chemical reaction for the formation of a free fatty acid from a soap molecule under acidic conditions.
Write a balanced chemical reaction for the formation of "soap scum" from a mixture of soap and "hard" water
A patient undergoing radiation therapy for cancer receives a 230-rad dose of radiation. Assuming the cancerous growth has a mass of 0.10kg , calculate how much energy it absorbs
The reaction makes more lime at highertemperatures. The reaction goes to completion at 1200. The equilibrium lies far to the right at roomtemperature.