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Question1
A 8kg mass moves in a circular path of 4m radius on a frictionless horizontal table. It is attached to a string that passes through a frictionless hole in the center of the table. A second 28kg mass is attached to the other end of the string. The acceleration of gravity is 9.8m/s^2. Establish the period.
Question2
The radius of curvature of the track at the top of a loop-the-loop on a roller coaster is 12.0m. At the top of the loop, force the seat exerts on a passenger is 0.40 times her weight. How fast is the roller coaster moving at the top of the loop?
a hydrogen atom is in the n=15 state. In the Bohr model, how many electron wavelengths fit around this orbit
Identify the equation below which is dimensionally incorrect. A, x, y and r have units of length. k here has units of inverse length. vo and v have units of velocity. a and g have units of acceleration. w has units of inverse time.
When a converging lens is used in a camera (as in the first drawing), the film must be placed at a distance of 0.170 m from the lens to record an image of an object that is 4.70 m from the lens
Most of the blackholes observed by astronomers have masses equal to a few solar masses (the result of the death of a high mass star) or have masses equal to several million solar masses
0.75mol of argon gas is admitted to an evacuated 70cm3 container at 40 degrees C. estimate the final pressure of the gas
Inside a motor, 30.5 A passes through a 250 turn circular loop that is 10.0 cm in radius. what is the magnetic field strength created
A planet's moon travels in an approximately circular orbit of radius 5.4 107 m with a period of 7 h 21 min. Calculate the mass of the planet from this information
By calculation, determine the wavelength of three principal visible lines of hydrogen from energy transitions n=3, 4
A hiker weighing 565 N carries a 186 N pack up Mt. Whitney (elevation, 4420 m), increasing her elevation by 3000 m. Find the minimum internal work done by the hiker's muscles
Two figure skaters, one weighing 625N and the other 700N , How much kinetic energy is created during the skaters maneuver
A 190-?F capacitor and a 80m H inductor are in series with a 105 ? resistor. What is the impedance at the resonant frequency
A transformer is to be used to provide power for a computer disk drive that needs 5.8 V (rms) instead of the 120 V (rms) from the wall outlet. determine the current in the primary
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