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Bright sunlight corresponds to radiation incident on the surfaceof Earth at about 1 kW m-2. What percentage of this energy can be "harvested" as carbohydrate in photosynthesis?
An initially neutral ball bearing is hooked up to a machine that transfers electrons onto it. Afterwards, the ball bearing is analyzed and its charge is -2.81×10-9 C. Find the mass increase du
There are two charges: q1 = +0.00010C and q2 = -0.00010C, both located on the x axis, at (-0.10m, 0.00m) (notation: x position, y position) and (+0.10m, 0.00m) respectively. What is the direction of
How many molecules of O2 are used to burn up all the wax? What mass of liqid water is produced when the wax burns? What volume od CO2g is produces if the reaction occurs atstp?
A rod of mass M and length L ( L = 3m) is pivoted on a frictionless hinge at the end. The rod is held at rest horizontally and then released. Determine the speed of the rod's tip at this moment. (Ic
The π electrons in benzene can be approximated as particles ona ring. Calculate the diameter of this "electron ring" if it is assumed that a transitionoccurring at 260.0 nm corresponds to an elec
What volume (in L) would the released CO2 occupy at 1.00 atm and25 degrees Celsius? (kH for CO2 at 25 degreesCelsius is 3.30 *10-2 mol/L*atm; PCO2in air is 3 * 10-4 atm)
According to the concentrations in the PROCEDURE and assuming thatyou are assigned to work with 1 mL of barium chloride,calculate the theoretical number of grams of barium sulfate that should be pro
A certain vibrating string on a piano has a length of 74cm and forms a standing wave having two antinodes. A) which harmonic does this wave represent? B) determine the wavelength of this wave. C) ho
A mixture of sodium chloride, ammonium chloride and silicon dioxide are first extracted with water and then the extract and the insoluble residue both heated to dryness.
A mercury barometer reads 749.0 mm on the roof of a building and 764 mm on the ground. Assuming a constant value of 1.29 kg/m3 for the density of air, determine the height of the building.
Chlorine has two stable isotopes of mass 34.97 u and 36.97 u.Suppose the percent abundance of the lighter isotope were 66.32%.What would be the atomic mass of Cl?
However, the units of this scale are the same as those on the fahrenheit scale rather than the celsius scale, what is the numerical value of the triple-point temperature of water on the rankine scal
How could you separate zinc chloride and zinc sulfide? Napthalene sublimes easily, but potassium bromide does not. How could you separate these two substances?
If the rails are originally laid in contact. what is the stress in them on a summer day when their temperature is 33 degrees celsius?
The best design for rockets is one in which both fuel materials runout at the same time to minimize excess mass. If the total mass ofboth components in a decaborane/oxygen rocket must be 4.291×
Suppose that the enzyme you are studying is regulated by phosphorylation. When the enzyme is phosphorylated, the Km for its substrate increases by a factor of 3, but Vmax is unaltered.
How many space must be left between adjacent rails if they are just to touch on a summer day when their temperature is 33degrees celsius?
Polyethylene can be chlorinated by inducing a random substitution of chlorine atoms for hydrogen. What is the concentration of Cl (in wt%) if this substitution occurs for 15% of all original hydrog
This is actually the sum of two half reactions. The sum of ahydrolysis reaction coupled to a condensation reaction isthermodynamically equivalent to the ligase reaction represented bythe overall rea
You pull a simple pendulum of length 0.240m to the side through an angle of 3.50degree and release it. a.) how much time does it take the pendulum bob to reach its highest speed? b.) how much time d
DNA structure, called the i-motif can be formed from sequences containing stretches of cytosine (C) residues. In this structure protonated C forms a noncanonical base pair with anunprotonated C.
A Styrofoam cup holding 110 g of hot water at 88°C cools to room temperature, 23.0°C. What is the change in entropy of the room? Neglect the specific heat of the cup and any change in temper
Human hairs have diameters between 17 and 180 μm. For a hair that has a 72.0 μm diameter, how many can fit between a pair of teeth on a comb that are 0.150 inches apart ?
A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. The time it takes for the ball to fall halfway to the ground is 1.3 s. Find the time it takes for the ball to fall fro