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An object hanging in air, as in Figure A below, caused the scale to balance at 0.420 kg. When the object was submerged in water, as in Figure B, the scale balanced at 0.23 kg. The density of water is equal to 1000 kg/m3. The density of air is so small that it can be ignored.
(a) Find the apparent weight of the object when submerged in water.
(b) What is the volume of the object?
(c) What is the density of the object?
A train is travelling up a 4.0 incline at the speed of 3.25 when the last car breaks free and begins to coast without friction. How long does it take for the last car to come to rest momentarily.
Heat engines take input energy in the form of heat, use some of that energy to do work, and exhaust the remainder. Determine the magnitude of the heat the athlete gives off
The energy momentum relationship for the conduction band of a 3D semiconductor is: E= (h bar)^2/2m*[k(x)^2/2+k(y)^2+k(z)^2]
Two conductors having net charges of +19.0 µC and -19.0 µC have a potential difference of 19.0 V between them. Determine the capacitance of the system.
A steel cable with total length 59 m and mass 110 kg is connected to two poles. The tension in the cable is 1,260 N, and the wind makes the cable vibrate with a frequency of 2 Hz. Calculate the wavelength of the resulting wave on the cable
Pretend a system is having Transverse waves. And those transverse waves on a string have wave speed 8.00 m/s amplitude 0.0700m and wavelength 0.320m. Write a wave function describing the wave
A 100 kg crate is being pushed across the horizontal floor by a force that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.230. What must be the magnitude of, so that the net work completed by it and the kinetic..
A large bouncy ball with a mass of 209 g is dropped straight down and then bounces back up to a height that is slightly lower than the point from which it was dropped. compute the magnitude of the average force that the floor exerts on the ball
A cell phone transmits at a frequency of 1.28 108 Hz. What is the wavelength of the electromagnetic wave used by this phone
A singly ionized 24Mg ion (mass 3.983 10-26 kg) is accelerated through a 2.8 kV potential difference and deflected in a magnetic field of 500 G in a mass spectrometer. Find the radius of curvature of the orbit for the ion
A gymnast is performing a floor routine. In a tumbling run she spins through the air, How much time does this maneuver take
An football is punted at 25.0 m/s at an angle of 30.0 degree above the horizon. What is the velocity vector of the ball when it is 5.00 m above the level ground
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