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A cube of iron 4cm on a side is floated in a bath of mercury. The density of iron is 7.87 g/cm^3. What percent of the cubes mass is located below the surface of the mercury?
three 1.50-v cells each with an internal resistance of 0.0500? are connected in series to form a battery with a
A car with a mass of 1500kg moving at 40m/s comes to a stop in8 seconds. What is the change in momentum of the car
A home (volume = 1000 m3) built in 1946 has urea formaldehyde insulation, which outgases into the home at a rate of 5 ng/hr, What is the steady state concentration (C) of formaldehyde in the home
A white dwarf star has surface temperature 20 kK. Where is the Wien peak in this star s blackbody curve
A string with a length of 0.7 m is fixed at both ends. What is the longest possible wavelength for the traveling waves that can interfere to form a standing wave on this string
An alpha particle of mass m = 6.68×10-27 kg, positive charge q = 2e, and initial kinetic energy K = 9.00 MeV is projected, how close to the center of the nucleus is the particle when it comes momentarily to rest
Inside a sealed wooden box of mass M there hangs, by a thread of negligible mass, a lead pellet also of mass M. What is the acceleration of the center of mass of the system of box
The energy gap in silicon is 1.1eV. The average electron effective mass is 0.31m, where m is free electron mass. Calculate the electron concentration in the conduction band of silicon at T=300K
What is the electric field of a parallel plate capacitor that has q=+5.53 uC on one plate and q=-5.53 uC on the other plate. The area of each plate is 0.023m
a mass-spring system oscillates on a horizontal frictionless surface with an amplitude of 3.24 cm.a if the spring
a steel wire of length 1.6 m and diameter 1.10 mm is joined to an aluminum wire of identical dimensions to make a
Explain the changes in acceleration, velocity, and net acceleration Of a man jumping off a plane in a parachute. Describe the changes with valid scientific principles.
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