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How much steam must be mixedwith 300.g of water in 155 g aluminum calorimeter initially at 20.0degrees c to obtain a final temp of 80.0 degrees c ? CAl = 0.215 cal/gC° CW = 1.00 cal/gC° Lf= 79.6cal/g Lv = 540 cal/g
One mole of an ideal gas at 27 °C is expanded isothermally from an initial pressure of 3 atm to a final pressure of 1 atm in two ways. (a) reversible, and (b) against a constant external pressure of 1 atm. find q, w, ΔU, ΔH, ΔSsys, ΔSsurr, ΔStotal..
A marble slides without friction in a vertical plane around theinside of a smooth, 21 {\rm cm}-diameter horizontal pipe. The marble's speed at the bottom is 4.5 {\rm {m}/{s}} this is fast enough sothat the marble makes a complete loop, never losin..
Three forces act on a body which moves with constant velocity. One force is 9 N acting at an angle of 70°, What is the angle of the third force
Place the light source with the object at 0 cm on the optical rail. Where is the position of the image?
A car with a total mass of 1.78 103 kg has wheels of radius 31.0 cm and moment of inertia 0.805 kg · m2. Find the car's rotational energy when the car is moving at a speed of 22.5 m/s
Just by the impact, the clay has speed v0 = 9 m/s, and the disk is rotating clockwise with angular speed w0 = 0.4 rad/s. Just following the impact, what is an angular speed of the combined system of wheel plus clay.
A 7.80-g bullet moving at 610 m/s penetrates a tree trunk to a depth of 5.80 cm, Use work and energy considerations to find the average frictional force that stops the bullet
A proton is fired from far away toward the nucleus of a mercury atom. Mercury is element number 80, and the diameter of the nucleus is 14.0, what is its closest approach to the surface of the nucleus
a woman stands on a scale in a moving elevator. her mass is 70.5 kg and the combined mass of the elevator and scale is
Jupiter has an average distance from the Sun that is about 5.2 times that of Earth. determine the orbital period for Jupiter
You push your physics book 1.60 along a horizontal tabletop with a horizontal push of 2.80 while the opposing force of friction is 0.550. What is the net work done on the book
A block is given an initial velocity of 5 m/s up a frictionless 19° incline. How far up the incline does the block slide before coming (momentarily) to rest.
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