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A small cubic block of copper (Cu) is carefully dropped into a beaker half full of mercury (Hg):
(a) Calculate the resulting equilibrium forces on the block (it is not bobbing or not moving).
(b) Prove if the copper block will float or descend to the bottom.
(c) What is the fractional volume of the copper block exposed (if it does float)?
An object with a height of 5cm is placed in front of a concave mirror that has a focal length of 12cm. where should the object be placed
. Once the crate has started to move, expalin how large must F be in order to keep the crate moving at a constant speed?
A red laser emits photons with a wavelength of 635 nm. If this laser has a power of 23 W, how many photons does it emit in 1 s? If the light emitted by the laser is absorbed with a black sail, what is the force on the sail?
An ideal gas is confined to a cylinder by a piston. The piston is slowly pushed so that the gas temperature remains at 20 degrees C. find the entropy change of the gas
A block of mass = 2.9 is attached to a string that is wrapped around the circumference of a wheel of radius = 8.3. Find the moment of inertia of the wheel
Light from a sodium lamp with a wavelength in a vacuum of 590 nm enters diamond in which the speed of light is 1.24 108 m/s. What is the wavelength of this light in diamond
A solenoid of length 6.3 cm and diameter 0.88 cm is wound with 178 turns per cm. The current is decreasing at a rate of 38.0 A/s. What is the induced emf in one of the windings
Starting from rest, a 92-kg firefighter slides down a fire pole. How far did he slide down the pole
A spring with the spring constant K=14N/m is compressed 15cm, What is the Elastic potential energy stored in the spring
Assume a falling body with mass m fellsan air resistance force which is proportional to the speed of the body (Fair= - bv),(a) determine the velocity as a function time for the body as well as the terminal velocity. (b) If the body falls downwith ..
A medium sized home may have a roof with a surface area of 120m2. Find the total amount of solar energy incident on the roof in one day
question1imagine you are on a planet similar to earth where an acceleration of gravity is approximately 10 ms2.the
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