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A bat moving with speed of 3.25 m/s and emitting sound of 35.0 kHz approaches a moth at rest on a tree trunk.
(a) What frequency is heard by the moth?
(b) If the speed of the bar is increased, is the frequency heard by the moth higher or lower?
(c) Calculate the frequency heard by the moth when the speed of the bat is 4.25 m/s
Seven tiny spheres of liquid mercury each have a diameter of 2 millimeters. They are now added together and coalesce into one larger drop. What is the diameter of this larger drop?
Use an enthalpy diagram to calculate the lattice energy of CaCl2 from the following information. Energy needed to vaporize one mole of Ca(s) is 192 kJ.
the heat of fusion of water is 6.008x103 jmol at its normal melting point of 272.15k. calculate the freezing point
Problem- An FM radio station has a frequency of 88.9 MHz (1MHz = 10*6 Hz). Determine the wavelength (in nm).
In a separate experiment with the same initial conditions, a pressure of 2.50 atm was applied to the gas, decreasing its volume from 4.40 to 1.76L in one step. If the final temperature was the same for both processes, what is the difference betwee..
calculate the ki of the inhibitor and determine the nature of the inhibitor. - An enzyme has a km of 8uM in the absence of an inhibitor and apparent km of 12uM in the presence of the 3uM of the inhibitor.
Define why gel electrophoresis is important in recombinant DNA technology. As well, explain how DNA molecules can be detected in gels.
a scuba diver with a lung capacity of 5.1 l inhales a lungful of air at a depth of 44 m and a pressure of 5.4 atm.if
A piece of galena has a volume of 5.4 cm3. If the density of galena is 7.5 g/cm3, what is the mass (in kg) of that piece of galena?
What is the atom economy of this process if aspirin is considered to be the desired product. Enter your answer as a percentage, to the nearest tenth of a percent.
Question- What is the velocity of an electron that has a de Broglie wavelength approximately the length of a chemical bond? Assume this length to be 2.9*10^-10m
An 8mL sample of an unknown concentration of NH3 is titrated with HCl. It is found that 12mL of 0.10M HCl is required to reach the equivalence point. What was the concentration of the NH3 in the initial 8mL sample?
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