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A flight attendant pulls her 69 N flight bag a distance of 246 m along a level airport floor at a constant velocity. The force she exerts is 37 N at an angle of 58° above the horizontal. Find t
A mixture consisting of 2.50×10!3 g of O2, 3.51×10!3 mol of N2, 4.67×1020 molecules of CO are placed in a vessel with a volume of 4.65 L at 15.4°C.
What is the maximum mass of I2 that can be obtained from 46.5 g KMnO4, 104 g KI and excess H2SO4?
How many cubic centimeters of an ore containing only 0.22% gold (by mass) must be processed to obtain $100 worth of gold?
A submarine dives 155.0 m at an angle of 12.0? below the horizontal. What is the horizontal component of the submarine's displacement?
A grindstome of radius 4m is initially spinning with an angular speed of 8 rad/s. Angular speed is the increased to 10 rad/2 over the next 4 seconds. What is the average tangential speed at the edge
According to the kinetic theory of gases, the translational kinetic energy of an ideal gas is given. Calculate the translational kinetic energy per mole for the He atoms and for the Ar atoms.
What is the molarity of C5H10O5 in an aqueous solution that is prepared by dissolving a 23.95 g sample of impure C5H10O5 in water to make 1,175 mL of solution. Assume that the sample is 77% C5H10O5
The acceleration due to gravity on the moon is 1.62 {rm{ m/s}}^{rm{2}}. What is the length of a pendulum whose period on the moon matches the period of a 1.60-m-long pendulum on the earth?
A stone is dropped at t = 0. A second stone, with 6 times the mass of the first, is dropped from the same point at t = 59 ms. (a) How far below the release point is the center of mass of the two st
An aqueous stock solution is 85.0% H3PO4 by mass and its density is 1.69 g/mL. What volume of this solution is required to make 1.00 L of 1.70 mol/L H3PO4(aq)? Give your answer in millilitres, accur
In the laboratory, a student named Georgia weighed 5.05 grams. Which component of the mixture is dissolved in the acetone?
Water flows over a dam at the rate of 680 and falls vertically 86 before striking the turbine blades. Calculate the speed of the water just before striking the turbine blades (neglect air resistance
A basketball player achieves a hang time of 0.61 s in dunking the ball. What vertical height will he attain? The acceleration of gravity is 9.8 m/s². Answer in units of m.
105 grams of ice is heated from !10.00° C to 0.00° C where it melts, then the water is heated to 10.00° C. Calculate the enthalpy change for this process.
A block of mass m is kept on a rough plank at a distance l from one of its end.if the plank is rotated with certain angular acceleration "alpha",the block slides when the plank makes an angle "theta
How will the equilibrium vapor pressure of water, p(H2O), change when the total volume of the cylinder is increased by a factor of 2?
Children in a tree house lift a small dog in a basket 4.70 m up to their house. If it takes 201 J of work to do this, what is that combined mass of the dog and basket?
An 87 gram arrow is fired from a bow whose string exerts an average force of 130 Newtons on the arrow over a distance of 82 centimeters. What is the speed of the arrow as it leaves the bow?
Is it an equilibrium solution? If not, what is the molar Gibbs energy of reaction for the formation of more AgCl(s) under these conditions. What reaction will occur spontaneously?
A 2000 kg car is slowed down uniformly from 16.0 m/s to 10.00 m/s in 3.60 s. (a) What average total force acted on the car during that time?
3NaHCO3 (aq) + H3C6H5O7 (aq) 3CO2 (g) + 3H2O (l) + Na3C6H5O7 (aq) If 1.10 g sodium bicarbonate and 1.10 g citric acid are allowed to react, how many grams of carbon dioxide will form?
What is the minimum volume of 2.07 mol/L HCl(aq) required to dissolve 14.7 g Mn metal? The atomic weight of Mn is 54.94 g/mol. The unbalanced chemical equation for the reaction is
A rectangular loop of wire is moving toward the bottom of the page with a speed of 0.025 m/s (see the drawing). The loop is leaving a region in which a 2.8 T magnetic field exists; the magnetic fiel
How much work is done during inflation against an external pressure 1atm. (101325 Pa.), from initial volume 0 to its final volume?