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A hydrogen atom that is initially at rest absorbs a photon with an energy of 21 eV. What is the momentum of the atom after it absorbs the photon?
An important feature of the Carnot cycle is that: A) its efficiency can be 100% B) its efficiency depends on the absolute temperature of the hot reservoir used.
As a small aircraft approaches a landing strip, it is flying along horizontally at constant (low) altitude, What is the weight of the plane? Air density = 1.29 kg m-3
An 11.00 kg crate is placed on a horizontal conveyor belt. The materials are such that static friction = 0.47 and kinetic friction = 0.24.
A uniform plank of length 4.3 m and weight 201 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x could a person who weighs 449 N walk on the overhanging part of the p..
How does the decrease in gravitational potential energy of a falling ball compare to its increase in kinetic energy.
An airplane must reach a speed of 377mi/h in order to take off. If the runway is 403 m long, what is the minimum value of the acceleration that will allow the airplane to take off successfully.
If a car traveling at 62 km/h will skid 22 m as its brakes lock, how far will it skid if it is traveling at 120 km/h when its brakes lock.
Consider two widely separated conducting spheres, 1 and 2, the second having twice the diameter of the first, What is the ratio of the final surface charge density of sphere 1 to that of sphere 2
Two slits are separated by .1 mm. Planar light incident on them produces a diffraction pattern on a board 1.35 m away, estimate the wavelength of light
A Submarine dives to a depth of 312 feet in the ocean, What is the fource (in pounds) acting on a hatch that has an area of 4.7 square feet
You have a compound microscope with a barrel of length 161 mm. Find the total angular magnification of the microscope for a person whose near point is 25.0 cm away
A satilite of mass 5500 kg orbits the Earth and has a period of 6600s. Dertermine the radius of its circular orbit and the altitude of the satelite
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