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Determine how many square meters of PV would it take to give 1 kW for a world population of 6 billion? If such cells were crystalline silicon of 200 microns thick (200*10^-6), determine the minimum
Torque is calculated in foot-pounds where the pounds means pounds of force that the force exerted by 1 pound under normal gravitational acceleration. Calculate what the SI units of torque are, and
Fire watcher spots same fire at N52 °'E from his position 4.5 miles south of ranger. How far is fire from closer of two observers?
When given a substance (like CCl4 orI2), Calculate the easiest way to conclude if the substance has London dispersion intermolecular forces?
Compute the absolute pressure at the bottom of a fresh-water lake at a depth of 32.1 m. Suppose the density of the water is around 1.00 x 103 kg/m3 and the air above is at a pressure of 101.3 kPa.
The average molecular weight of a nucleotide pair is 660 g/mol and each nucleotide pair contributes 0.34 nm to the length of DNA. The molecular weight of an E coli DNA molecule is about 3.1 X109&nbs
Wavelength of the sound wave in a room is 1.13 m and the frequency is around 301 Hz. Find out the speed of the wave in the room?
Calculate the pH at the half-equivalence point where a solution having an unknown concentration of benzoic acid (Ka= 6.5x 10-5) is titrated using a standardized solution of sodium hydroxide.
Standing at the top of the 150-foot cliff, angle of depression to the ship off shore is 14 degree. How far is ship from foot of cliff?
Blood pressure is equivalent to the pressure under mercury of a particular depth and it is measured in millimeters of mercury. For example, a systolic pressure of 160 is actually equal to the pressu
Recognize the acid and the number of equivalents per mole and do the same for the base. Balance the following acid-base neutralization reaction. FeCl3 (Ferric chloride) reacts with NaHCO3(sodium bi
Find out, how much work should the father do to pull the sled 0.2 km all along the slope? If he does this 5 times in an hour, determine his average power output?
Determine the percentage change in your weight as you move from the North Pole, where g = 9.789 m/s2, where g = 9.832 m/s2 to the Equator.
Population of the city has the annual growth rate 1.2% per year. If intial population of city is 152,000. Determine the formula for P(t), population in year t.
Calculate the difference in potential energy of a mercury atom among the top and bottom of a column of mercury in a barometer when the pressure is 1.0 atm?
A solution having an unknown concentration of benzoic acid, Ka=6.5 x 10-5 is titrated using a standard solution of sodium hydroxide. Outline the titration curve, labeling the equivalence and half equ
The sodium bromide reacts to give bromine, a red-brown liquid, and sodium chloride. A solution was made by dissolving 19.8 g of sodium bromide in100.0 g of water when chlorine gas is bubbled into a
A railroad engine pulls a train of mass 1.4x10^6 kg up an average slope of 1.2o for a distance of 59.0 km. When the speed of the train is 43.0 km/h, determine the average power generated by the engine
George of the Jungle (80 kg) is running via the jungle at a speed of 11 m/s, trying to escape the wrath of story's Narrator. He spots a vine and grabs it, hoping to make a tree branch, 10 m over him
How many pounds of cashews must be mixed with peanuts so that mixture will make same revenue as would selling nuts separately?
Magnitude E of the electric field based on the radial distance r according to E = A/r^4, where A is a constant having unit volt-cubic meter. As a multiple of A, determine the magnitude of the electr
The car is hauling a 91 kg trailer, to which it is joined by a spring. The spring constant is 2200 N/m. The car accelerates with the acceleration of 0.32 m/s2. Find out by how much does the spring s
The car's wheel radius is 15 inches. If wheels are turning at 6 revolutions per second, how fast is car moving? Define the equation to determine the speed.
The person having weighs 610 N steps onto a spring scale in the bathroom, and the spring compresses by 0.74 cm. (i) Determine the spring constant? (ii) Determine the weight of the other person who com
The simple pendulum is build from a 0.59 m long string and a small ball joined to the free end. The ball is pulled to one side via a small angle and then free from rest. After the ball is free, dete