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When 200g of aluminum at 100° c is dropped into aluminum calorimeter of mass 120 g and containing 150g kerosene at 15° C, the mixture reaches at temperature of 50° C. What is the specific heat of kerosene? (sp. Ht. of Al = 0.214 cal/g-°C)
Which of the following sets of variables result in a linear graph when plotted? (Choose as many as two)
Free neutrons (unlike those in the nucleus of an atom) decay spontaneously into a proton, an electron and an antineutrino. How much energy is released in this decay
A spool whose inner core has a radius of 1.00 cm and whose end caps have a radius of 1.50 cm has a string tightly wind around the inner core. What is speed of the top point of spool
A solid block is suspended from a spring scale.When the block is in air the scale reads 35.9 N, when immersed inseawater the scale reads 30.3 N, What is the density of the block
An object of mass m1 = 2.10 kg placed on a frictionless, Draw free-body diagrams of both objects, This answer has not been graded yet
A football is thrown at an angle of 38 above the horizontal. Assume the ball is throw and received at the same height. what must be the initial speed of the ball
A uniform board is leaning against a smooth vertical wall. The board is at an angle above the horizontal ground. The coefficient of static friction between the ground and the lower end of the board is 0.620.
A 12 kg box slides 4.0 {rm m} down the frictionless ramp, and then collides with a spring whose spring constant is 240 N/m.
A harvest mouse can detect sounds as quiet as -10 . Suppose you are sitting in a field on a very quiet day while a harvest mouse sits nearby at the entrance to its nest. How far is the harvest mouse from the leaf
A 14.0-m uniform ladder weighing 510 N rests against a frictionless wall. The ladder makes a 63deg angle with the horizontal. what is the coeffecient of static friction between ladder and ground
The outside mirror on the passenger side of a car is convex and has a focal length of -5.7 m. compute the magnification of the mirror
A neon sign requires 10000 V for its operation. It operates from a 220 V receptacle. What must be the turns ratio Ns/Np of the transformer
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