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A car moving initially at 20m/s comes gradually to stop in 400m. What was the acceleration of the car?
A certain element has a mass per mole of 54.9380 g/mol. How many moles of atoms are in a 268-g sample
A 380-kg sailboat has an acceleration of 0.636 m/s2 at an angle of 65.5 ° north of east. Find the direction of the net force that acts on the sailboat
A prism is made of glass of unknown RI. A parallel beam of light is incident on a face of the prism. The angle of min deviation is measured to be 40 degree. What is the Refractive Index of the prism
11Na decays to 22 10Ne via ß+ with Tmax = 0.542 MeV followed by ? -decay with energy 1.277 MeV. If the mass of 22Ne is 21.991385 amu, determine the mass of 22Na in amu.
You slide a crate up a ramp at an angle of 30.0° by exerting a 225-N force parallel to the ramp. The crate moves at constant speed. The coefficient of friction is 0.28. How much works have you done on the crate when it is raised a vertical distance o..
Heat pump and refrigerator
A piece of sandston with a bulk volume of 1.3 cc is contained ina 5-cc cell filled with helium at 760 mm Hg. Temperature ismaintained constant and the cell is opened to another evacuatedcell the same volume. The final pressure in the two vesselsis..
One kilogram of water is heated from an initial temperature of 283K to a final temperature of 372K. Calculate the change in entropy. Assume the specific heat of water to be 4186 J/kgK. Hint: the amount of heat gained is a function of the temperature.
A man stands on the roof of a 10.0m -tall building and throws a rock with a velocity of magnitude 24.0m/s at an angle of 34.0 degree above the horizontal. Calculate the horizontal distance from the base of the building
What energy is required to completely remove an electron from the n = 3 level of hydrogen? What is the electron's energy when removed?
One end of a 0.23-m copper rod by a cross-sectional are a of 1.19*10-4 m2 is driven into the enter of a sphere of ice at 0° C (radius = 0.16 m). The portion of the rod that is embedded in the ice is also at 0° C. The rod is horizontal and its other e..
A parallel combination of a 1.09-?F capacitor and a 2.81-?F one is connected in series to a 4.33-?F capacitor. This three-capacitor combination is connected to a 15.3-V battery
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