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Q. An experiment measures the temperature of a 270 substance while steadily supplying heat to it. The results of the experiment show. What are (a) specific heat of the liquid phase and (b) the heat of vaporization?
A jumper in the long jump goes into the jump with a speed of 12.0 m/s at an angle of 20 degrees above the horizontal. How far does the jumper jump.
An 85 kg spacewalking astronaut pushes off a 655 kg satellite, exerting a 115N force for the 0.600 s it takes him to straighten his arms.
An object weighing 338 N in air is immersed in water after being tied to a string connected to a balance. The scale now reads 302 N. Immersed in oil; object weighs 313 N. Calculate the density of the object.
Find the slit width. compute the coefficient of kinetic friction between the slide and the child.
What is the electric potential energy of the system. A man strikes a long aluminum rod at one end. Another man, at the other end with his ear close to the rod, hears the sound of blow twice (once through the air and once through the rod), with a 26..
A certain car battery with a 12.0 V emf has an initial charge of 178 A•h. assume that the potential across the terminals stays constant until the battery is totally discharged, for how long in hours can it deliver energy at the rate of 115 W.
A spring has a force constant of 931N/m and an unstretched length of 8 cm. One end is attached to a post that is free to rotate in the center of a smooth table.
What is the maximum speed the masses
Suppose that a structure of arbitrary complexity has a number of forces applied to it (at various points) and yet is in static equilibrium. The principle of virtual work allows one to write an equation that relates the applied forces.
A friend is working on a biology experiment and needs to make an electric field of magnitude 460 {rm N/C} at a distance of 10 {rm cm} from the central portion of the large nonconducting square plate 5.2 {rm m} on each side.
An electron is at rest just above the surface of a sphere with the radius of 1.90 mm and a uniformly distributed positive charge of 2.1 x10-15 C.
The magnitude FN of the normal force that each side of the tread channel exerts on the stone is 1.8 N. Suppose that only static friction supplies the centripetal force, & find the radius r of the tyre.
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