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An electron with velocity 4x10^6 m/s strikes a ‘ He+ ‘ ion. Discover the n^th energy level the electron will excite to. Compute the wavelength of the light as the electron returns to ground state.
Two grams of 100 degree C steam are injected into a wellsealed styrofoam container that holds a mixture of 24 grams of iceand 50 grams of liquid water, both at 0 degree C.
Sound is generated from standing waves in two tubes which are both open at both ends and are identical, apart from one tube having length L and the other tube being only seven eighths as long. If the speed of sound is v, what is the expression for th..
Two stars, with masses m1 and m2 that are initially very far apart and at rest (and even farther from any other stars) are pulled together by their gravitational attraction. Determine their relative speed when they are a distance d apart from one ano..
A balloon ofvolume 2.2 m3 contains argongas at a pressure of 6.3 105 Pa and room temperature (20°C). What is the total internal energy of the gas
In a chase scene, a movie stuntman runs horizontally off the flat roof of one building and lands on another roof 2.1m lower. If the gap between the buildings is 4.8m wide, how fast must he run to just barely cross the gap? In other words, what is his..
A heat engine has a useful work output of 4.0 kJ and expels 8.0 kJ of exhaust energy in each cycle. what is the engine's thermal efficiency
A hydrogen atom initially in the ground state absorbs a photon, determine the wavelength and frequency of the photon
At time t=0 a grinding wheel has an angular velocity of 28.0 rad/sec. It has the constant angular acceleration of 35.0 rad/sec^2 until a circuit breaker trips at time t=1.80. From then on, the wheel turns through an angle of 433 as it coasts to the s..
a beam of laser light with wavelength 612 nm is directed through a slab of glass having index of refraction 1.5.a for
An object at rest explodes into three pieces of equal masses. One moves east at 23 m/s, while the second piece moves northwest at 14 m/s. Estimate the velocity of the third piece? Suppose each piece has a mass of 2 kg.
A spring is hung from the ceiling. A 0.300-kg block is then attached to the free end of the spring. Find the angular frequency of the block's vibrations
The core of a star collapses during a supernova, forming a neutron star. find the neutron star's angular velocity in revolutions per second, given the core's was originally 1.0 revolution per 30 days
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