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2.50 kg block slides down the inclined plane at a 20.0degree angle as shown below.
(1) If the lenght of the incline is 2.0, calculate the work done by the force of grvity.
(2) Calculte the work done by the force of friction.
(3) Calculate the net work done by both gravity and friction?
The lens of an endoscope is carefully matched such that the light ray from the edge of the lens enters the fiber at an angle. What focal length should the lens have
A soccer ball of diameter 30 cm rolls without slipping at a linear speed of 2.7 m/s. Through how various revolutions has the soccer ball turned as it moves a linear distance of 16 m.
A vertical tube 1.9cm in diameter and open at the top contains 4.0g of oil (density 0.82 g/cm^3) floating on 4.0g of water. Find the gauge pressure at the oil-water interface
A single conservative force acts on a 5.30-kg particle within a system due to its interaction with the rest of the system. calculate the change in the potential energy of the system
A gas bubble with an initial volume of 7.00 milliliters rises from a depth of meters. If the temperature does not change, what is its volume, to nearest ml, when it reaches the surface (density of water=1000 kg/m^3)?
A hydrogen atom is in its second excited state (n = 3). calculate angular momentum of the electron
How much energy is lost through your hands in one minute after touching on a cold surface at 10 C compared to being exposed to cold air at 10 C
a 25-N block slides down a plane inclined at 21.2 degrees to the horizontal with constant velocity. find the total force resisting the motion of the block
A child is pushing a merry-go-round. The angle through which the merry-go-round has turned varies with time according to ?(t)=?t+?t3, What is the initial value of the angular velocity
The distance between the objective and eyepiece lenses in a microscope is 24cm, What eyepiece focal length will give the microscope an overall angular magnification of 350
A pear of 10.2 cm height is placed at a distance of 20.1 m in front of a lens that has a focal length of 26 mm. How large is the image of the pear
The allowed energies of a simple atom are 0.0 eV, 3.0 eV, and 4.0 eV. What is the minimum speed the electron could have after the collision
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