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In a heat conductivity experiment, a slab of silicon of thickness 2 x 10^-3m and area of 0.40m^2 seperates condensing steam(lv=540cal/g) at 100 degree C and melting ice(Lf=80cal/g) at 0degreeC. Once steady state conditions are achieved, 46g of ice are found to melt in one minute. Find the increase of entropy in the universe during one minute of this experiment. Please show all work
A coffee filter of mass 1.1 grams dropped from a height of 1 m reaches the ground with a speed of 0.5 m/s. How much kinetic energy Kair did the air molecules gain from the falling coffee filter? Start from the Energy Principle and select as system..
Light of wavelength 659.4 nm is emitted by a star. The wavelength of this light as measured on Earth is 661.4 nm. How fast is the star moving with respect to Earth
What is the change in entropy for the system. How much force must be applied to climb the hill at the same speed and same air resistance.
A batted baseball leaves the bat at an angle of 33.0 above the horizontal, How high does the ball rise above the point where it struck the bat
The detective who investigated the scene of the crime found a second bullet, from the shot that missed Mr. Wesson, that had embedded itself into a chair.
A 95 long train begins uniform acceleration from rest. The front of the train has a speed of 25 while it passes a railway worker who is standing 170 from where the front of train started. What will be the speed of the last car as it passes the wor..
The scalar product of vectors and is +51.0. Vector has magnitude 9.00 and direction 28.0 west of south. If vector has direction 36.0 south of east, what is the magnitude of.
A soccer ball is kicked with an initial horizontal velocity of 18 m/s and an initial vertical velocity of 21 m/s, How far from where it was kicked will the ball land
Two forces act on a 100-kg block resting on the floor. The first force, pointing parallel to the floor, What is the magnitude of the net force on the block
Two horizontal forces, 249 N and 165 N, are exerted in opposite directions on a crate. What is the net horizontal force on the create? Be sure to point to the direction of the net force.
plan a vector to represent each of the two teams. find the magnitude of the resultant.
A spacecraft is traveling with a velocity of v0x = 5675 m/salong the +x direction. Two engines are turned on for a time of 847 s. One engine gives the spacecraft an acceleration in the +x direction of ax = 1.25 m/s2,while the other gives it an acc..
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