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A 5.00-kg steel ball is dropped onto a copper plate from a height of 10.0 m. If the ball leaves a dent 3.20 mm deep, what is the average force exerted by the plate on the ball during the impact?
There is friction as the pulley turns. The block starts from rest, and its speed after it has traveled downwards a distance of D= 0.65 m, is 1.388 m/s. Calculate the amount of energy dissipated up t
A 500 watt heater is used to heat water in a plastic bucket. Assume that 90% of the heat produced by the heater goes into heating the water.
She is at rest relative to the spacecraft just before catching the 2.9 kg book. Find the astronaunts velocity just after she catches the book.
The original volume is 50. cm3. If the combustion of this mixture releases 1383. J of energy, to what volume will the gases expand against a constant pressure of 655. torr if all the energy of combu
A gas has a volume of 2.8 L at a temperature of 27 degrees celsius. What temperature (degrees Celsius) is needed to expand the volume to 15 L ? (P and n are constant.)
(a) What is the total momentum of the system of the two carts at this instant? (b) What was the velocity of the first cart when the second cart was still at rest?
The coefficient of kinetic friction between the tires and the road is 0.725. How far does the truck skid before coming to a stop?
Element X, a member of group 5A, forms two chlorides, XCl3 and XCl5. Reaction of an excess of Cl2 with 8.729g of XCl3 yields 13.233g of XCl5. What is the atomic mass and identity of the element X?
The drop in her vertical height is 2.6 m. If her mass is 59 kg, how much work is done by the (nonconservative) force of the wave?
By how much does the potential energy of a(n) 20.5-kg child increase when the child climbs a normal staircase to the second floor?
How many grams of sodium lactate should be added to 1.00 L of 0.160 M lactic acid to form a buffer solution with pH = 4.10? Assume that no volume change occurs when the sodium lactate is added.
The hammer throw is a track-and-field event in which a 7.8-kg ball (the ''hammer''), starting from rest, is whirled around in a circle several times and released. It then moves upward on the familia
The hydrogen gas formed in a chemical reaction is collected over water at 30 degrees celsius and a total pressure of 732 mmHg.
A 2.50 kg mass is attached to a light cord that is wrapped around a pulley of radius 3.45 cm, which turns with negligible friction. The mass falls at a constant acceleration of 3.85 m/s2. Find the m
A boy of mass 46.2 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.2 m/s. The boy falls off the skateboard, and his center of mass moves forward at a speed of 10.9 m/s. Find
Twenty dietary iron tablets with a total mass of 22.131 g were ground and mixed thoroughly. Then 2.998 g of the powder was dissolved in concentrated HNO3 and heated to convert all the iron to Fe3+.
Four point charges are placed at the corners of a square of side 0.20 m. The top two charges are 16 µC and the bottom two are -16µC. Find the electric field at the center of the square.
Upon quenching the steel from 950 degree Celsius to 50 degree Celsius what phases will be present what will be the composition?
A heat lamp emits infrared radiation whose rms electric field is Erms = 3500 N/C. (a) What is the average intensity of the radiation? (b) The radiation is focused on a person's leg over a circular a
At the top of a building the barometric pressure reads 730 mm Hg, at the bottom of the building the barometric pressure reds 755 mm Hg. considering density of mercury to be 13600 kg/m^3, and densit
Ignore any friction between the skateboard and the sidewalk. What is the skateboard's velocity relative to the sidewalk at this instant? Be sure to include the correct algebraic sign with your answe
Calculate the concentration of ClO^ - at equilibrium if the initial concentration of HClO is 7.5×10^-3 M.Calculate the concentration of HClO at equilibrium if the initial concentration of HClO