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A person starts walking from home and walks: 4 miles East. Find the total displacement vector for this walk. If this person walked straight home, they'd have to walk.
What is the vacuum wavelength ? vacuum in the visible range (380 nm to 750 nm) at which destructive interference causes the film to look dark in reflected light?
A potential difference of 120 V produces a current of 8.0 A in the heating element of a toaster. What is the resistance of this heating element while the toaster is carrying this current?
A solution of 1.00 g of a protein in 20.0 ml of water has an osmotic pressure of 35.2 torr at 298 K. Calculate the molar mass of the protein.
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?
What is the molarity of a solution of NaOH if 38.6 mL of the solution are titrated by 1.00 g of oxalic acid dihydrate?
A block of mass 0.80 kg is suspended by a string which is wrapped so that it is at a radius of 0.054 m from the center of a pulley. The moment of inertia of the pulley is 0.0040 kg·m2.
A chemist has two large containers of sulfuric acid solution, with different concentrations of acid in each container. What are the concentrations of sulfuric acid in the original containers?
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. How long does it take for 2 kg of water at 100 degrees C
What is the lowest price at which the item would be supplied? How many rings will be supplied if the unit price is P 4,600?
In zinc at room temperature, the mobility of mobile electrons is about 1.6 multiplied by 10-3 (m/s)/(V/m), and there are about 6.6 multiplied by 1028 mobile electrons per m3. Calculate the conductivit
State Realty Corporation handles an apartment complex consisting of 100 units. What is the maximum monthly rental for each apartment unit?
A calorimeter contained 75.0 g water at 16.95 degrees C. A 93.3 g sample of iron at 65.58 degrees C was placed in it, giving it a final temperature of 19.68 degrees C for the system.
Find the vertex, focus and directrix of the proabola. Sketch the graph, showing the focus and the directrix. If you can graph please do so.
The structure of O-aminobenzoic acid can be determined by titration with 0.2M sodium hydroxide. How many mL of base would be needed to neutralize 0.5 g of starting material?
If the width is somewhere in between 3 and 20 feet, what dimensions of the rectangle maximize the area enclosed in the fence?
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. How long does it take to heat 2 kg of water from 25 degre
The equation of the line perpendicular to this line going through (a + 4, b + 6), Are the lines is equations of perpendicular to each other, or parallel?
A 10 mF capacitor and a 20.0 mF capacitor are connected in parallel with a 6.0 V battery. What is the charge on the 20.0 mF capacitor?
Hydroxylation of cis-2-butene with OsO4 yields 2,3 butanediol. What stereo chemistry do you expect for the product? Explain in detail why this is the answer.
A truck is traveling at 11.1 m/s down a hill when the brakes on all four wheels lock. The hill makes an angle of 10.0° with respect to the horizontal. The coefficient of kinetic friction between
Suppose that in starting a car on a cold morning a current of 125 amperes is drawn for 15.0 seconds from a cell of the type described above.
Suppose she starts at the top of the wave with a speed of 1.7 m/s and moves down the wave until her speed increases to 8.5 m/s. The drop in her vertical height is 2.6 m. If her mass is 59 kg, how mu
The amount of caffeine in the bloodstream decreases by 25% every hour. How many hours will it take for the amount of caffeine to reach half of the amount in the initial espresso?
For comparison, a .22 caliber bullet has a mass of 2.6 g and, starting from rest, exits the barrel of a gun with a speed of 409 m/s. Determine the work done to launch the motion of both the hammer a