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A hunter wishes to cross a river that is 2.3 km wide and flows with a speed of 5.0 km/h parallel to its banks. The hunter uses a small powerboat that moves at a maximum speed of 9 km/h with respect
A portable electric water heater transfers 225 watts (W) of power to 5.5 L of water, where 1 W = 1 J/s. How much time (in nanoseconds) will it take for the water to heat 5.5 L of water from 298.15 K
Then swinging the thermometer back and forth in air. it is observed that the the wet-bulb thermometer is always less than or equal to the dry-bulb temperature. explain why?
What is the formula for the acceleration a of the hanger in terms of the tension T, the hanger's mass m, and the acceleration of gravity g?
A 545 g ball swings in a vertical circle at the end of a 1.3 m-long string. When the ball is at the bottom of the circle, the tension in the string is 14 N. What is the speed of the ball at that po
A jetliner, traveling northward, is landing with a speed of 63.8 m/s. Once the jet touches down, it has 763 m of runway in which to reduce its speed to 11.2 m/s. Compute the average acceleration (ma
If 3.40 g of copper was recovered and you started with 7.05 g of copper (II) chloride, then what is the percent yield of the reaction ?
A stationary proton is accelerated through a potential difference of 83.5 kV. What speed did the proton acquire?
What is the maximum number of electrons that could be ejected from this metal by a burst of light (at some other frequency) with a total energy of 1.91*10^-7
What is the boiling point of water and potassium nitrate, when mixed together?
A solution of acetic acid, CH3COOH, has a concentration of 0.199 M and a density of 1.00 g mL-1. What is the molality of this solution?
A Ball Rolling Uphill. A bowling ball rolls without slipping up a ramp that slopes upward at an angle beta (B) to the horizontal. Treat the ball as a uniform, solid sphere, ignoring the finger hole
Abundance mass74%, 93amu and 26%, 117amu. What is the atomic weight for exonium? Answer in units of amu.
The column is operated under total reflux and the distillate composition was measured as 0.982 mole fraction chloroform and bottoms of 0.037 mole fraction chloroform. Determine the relative volatili
Derive an expression for the mean free path for any gas in terms of the collision diameter, the temperature, and the pressure.
Rb has two naturally occurring isotopes 85Rb and 87Rb, with masses 84.9118 amu and 86.9092 amu, respectively. The average atomic mass is 85.468 amu. What is abundance of each one?
At what level of protein structure is limited rotation of peptide bonds important? What is the impact of protein structure on protein function?
A cord of length 1.5 m is fixed at both ends. Its mass per unit length is 1.2 g/m and the tension is 12 N. What is the frequency of the fundamental oscillation?
Calculate the percentage conversion of functional groups required to obtain a polyester with a number-average molar mass of 24,000 g mol-1 from the monomer HO(CH2)14COOH.
Evaluate the number-average molar mass Mn of the polyamide, and also estimate its weight-average molar mass Mw by assuming that it has the most probable distribution of molar mass.
Determine the binding energy (in Joules) of a Cobalt atom
If the density of water is 1.00g/mL, what is the weight in pounds of gallom of water? you may assume that mass and weight are equivalent at the earth's surface.
A Typical packet contains 250 grams of iron to warm your hands or feet for up to 4 hours. How much heat is produced in this reaction?
Caluclate % recovery of panacetin from the individual masses of its mictures, sucrose (.044g), aspirine (.093), and the unknown (.339).
What is the lift due to bernoulli's principle on a wing of area 80 m^ 2 if the air passes over the top and bottom sufaces at speeds of 340m/s and 290m/s, respectively?