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A Styrofoam calorimeter contains 40.0g of water at 50°C. To this we add 2.0g of ice at initial temperature of 0°C. Assume that all of the ice has melted at equilibrium.
a) How much heat (in calories) is needed to melt the ice?
At the edge of town, the driver again accelerates. the driver would usually maintain a constant acceleration that is less than the maximum
A ball with mass m = 0.170 kg and kinetic energy K1 = 2.17 J collides elastically with a second ball of thesame mass that is initially at rest. find the kinetic energy of the first ball after the collision
The diffusion constant for the alcohol ethanol in water is 1.24 10-9 m2/s. A cylinder has a cross-sectional area of 3.85 cm2 and a length of 1.86 cm. what mass of ethanol diffuses through the cylinder
You need a transformer to reduce a voltage of 150 V in the primary circuit to 25 V in the secondary circuit. What is the effective resistance of the secondary circuit
a 45.0N block rests on a horizontal table. a horizontal force of 36.0 N is applied to the block. what is the magnitude of the blocks acceleration
An electron initially at rest is accelerated between two parallel plates 2.000 cm apart. find the electric force on the electron between the plates
drop a rock into a well. You hear the splash 2.40 s after you release the rock from rest. How far below the top of the well is the surface of the water
the record of 203.1 km/h for speed skiing set by franz weber at velocity peak in colorado was achieved in a mountain slope inclined downward at 51 degrees. what is the rate at which gravity does work on the skier
A 2.50 g bullet, traveling at a speed of 465 m/s, strikes the wooden block of a ballistic pendulum. The block has a mass of 275 g. What is the speed of the bullet/block combination immediately after collision.
An airplane flies horizontally with speed 1000km/h(280m/s) an engine falls it takes 30s to gets to the ground. neglect air resistance elucidate the airplane is 4.5km high?.
A small mailbag is released from a helicopter that is descending steadily at 1.75 m/s. After 5.00 s, what is the speed of the mailbag
Two points in a rectangular coordinate system have the coordinates (4.7, 2.5) and (-2.5, 4.7), Determine the distance between these points
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