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Relative to the ground determine the angle of the velocity vector of the package just before impact.
Hydrogen gas is collected over water at 24 degrees celcius. The total pressure of the sample is 755 millimeters of mercury. At 24 degrees celcius, the vapor pressure of water is 22 millimeters of me
As a result of a chemical spill, benzene is evaporating at the rate of 1 gram per minute into a room that is 6 m * 6 m * 3 m in size and has a ventilation of 10 m3/min.
If the launcher gives the projectile a muzzle velocity of 25m/s, what is the range of the projectile? [Hint: The acceleration due to gravity on the Moon is only one sixth of that on the Earth.]
What would have been the unrealistically large acceleration experienced by the space travelers during their launch? (A human can stand an acceleration of 15g for a short time.)
What is the neutralizing power of one dose of baking soda? One dose is 1/2 teaspoon of baking soda dissolved in 4fl oz of water.Use 0.71 g/mL as the density of granular baking soda. 1teaspoon = 4.93
A river has a steady speed of 0.500 m/s. A student swims upstream a distance of 1.00 km and swims back to the starting point. If the student can swim at a speed of 1.20 m/s in still water, how long
A circular surface with a radius of 0.061 m is exposed to a uniform external electric field of magnitude 1.32 x 104 N/C. The electric flux through the surface is 77 N · m2/C. What is the angle
A sample of propane (c3h8) is placed in a closed vessel together with an amount of O2 that is 2.50 times the amount needed to completely oxidize the propane to CO2 and h20 at constant temperature.
A platinum resistance thermometer has resistances of 170.0 when placed in a 0°C ice bath and 244.8 when immersed in a crucible containing a melting substance. What is the melting point of this s
The Ferrari laps that Porsche after the Porsche has completed 9 laps. If the speed of the Ferrari has been 10km/h less, the Porsche would have traveled 18 laps before being overtaken. What were the
Calculate the maximum force constant of the spring k_max that can be used in order to meet the design criteria.
Gold can be hammered into extremely thin sheets called gold leaf. If a 208-mg piece of gold (density = 19.32 g/cm3) is hammered into a sheet measuring 2.4 multiplied by 1.0 ft, what is the average t
Jose sees the tree strike 1.0 microseconds before he sees the barn strike. According to Jose, were the lightning strikes simulataneous? If not, which occured first and what was the time difference bet
The spheres have a combined charge of + 55uC and repel one another with a force of 0.75 N. Assume q1>q2.What is the surface charge density on the first sphere?
Calculate the mass of oxygen dissolved in a 70.0 L aquarium maintained at room temperature. the total pressure is 760mmHg and the mole fraction of oxygen in air is 0.209
A mass of 50.0 g of water at 373 K flows into 120. g of water at 300. K and 1 atmosphere. Calculate the final temperature of the system once equilibrium has been reached.
A 181 g ball is tied to a string. It is pulled to an angle of 4.0 C and released to swing as a pendulum. A student with a stopwatch finds that 30 oscillations take 16 s.
The defroster directly heats an area of 0.45 m2 of the rear window. What is the maximum thickness of ice above this area that the defroster can melt in 3.6 minutes?
At standard temperature and pressure, what volume of oxygen would be required to be required to burn 2000 g of propane? If air is 21 percent oxygen, what volume of air at STP would be required?
The windows in an office building are 4.26 m by 5.26 m. On a stormy day, air is blowing at 53.0 m/s past a window on the 53rd floor. Find the magnitude and direction of the net force on the window.
5.00mL of such solution is pipetted into a clean 100.00mL flask and diluted with water to the mark. What's the concentration of this solution?
A 255 g mass attached to a horizontal spring oscillates at a frequency of 2.50 Hz . At t=0 s , the mass is at = 4.40 cm and has vx = -32.0 cm/s . Determine:
What minimum coefficient of friction between a rider's clothing and the wall is needed to keep the rider from slipping?
Consider the reaction: 200.00mL of 0.125M Pb2+(aq) is mixed with 400.00mL of 0.175 M Cl- (aq). PbCl2 forms. What's the limiting reactant and how many grams of PbCl2 forms and precipitates out of the