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A certain radioactive element emits a gamma ray with a frequency of 1.13 x1020 Hz. Gamma rays are electromagnetic radiation of very short wavelength emitted by the nuclei of radioactive elements.
A certain crystal provides a deflection angle of 30 degrees for the first-order maximum of monochromatic X-rays having a frequency of around 4.4 × 1017 Hz.
The atomic mass of an a particle is around 4.002 603 u . With the energy released in 3.66 days determine amount in kilograms the ice could be melted at 0*C?
Explain what will be the result if a student extracts first with NaOH then with NaHCO3. Explain why are the acidification steps necessary after the two extractions?
The take-up reel of a cassette tape consists of an average radius of 1.4 cm. Determine the length of tape (in meters) which passes around the reel in 56 s if the reel rotates at an average angular s
Determine expected holding period return over next year? How much of this return is due to capital gains (price appreciation) and how much is attributable to dividend yield?
Assume that you carry out an analytical procedure to generate a calibration curve. Then you analyze an unknown and find the absorbance that gives a negative concentration for the analyte. What does
Calculate the kinetic energy of an electron (in J) that is ejected from the sodium by light with a wavelength of 340 nm? Electrons are ejected from the sodium metal by any light that has a wavelengt
When we take the diameter of a proton to be 1.0* 10^ -15 m, then what would be the mass of the mini black hole?
What is the concentration of H2S in mg/L when the hydrogen sulfide, which is extremely toxic to humans, can be detected at a concentration of 2.00 ppb and which is having the densi
Glycine is an amino acid made up of hydrogen, carbon, oxygen, and the nitrogen atoms. Combustion of a .2036 gram sample gives the 1.00 atm and.122 g of water and 132.9mL of CO2 at 25oC.
Determine the final temperature inside the calorimeter (c of copper =0.387 J/g·K)? One piece of copper jewelry at the 105°C has exactly twice the mass of another piece, which is at t
The company is submitting bids for 2 different projects, project A and project B. Find probability of winning at least one of the bids?
Determine the total amount of solute that will be extracted by the ether, K=1.0? An aqueous solution which is having 5.0 g of solute in the100 ml is extracted w/three 25 ml portion of diethyl ether
A transformer is to be employed to give power for a computer disk drive which requires 5.4 V (rms) rather than the 120 V (rms) from the wall outlet. The number of turns in the primary is around 395
Find out the equivalent mass of the unknown solid acid in gram per mole of H+ if an acid sample of mass 0.730g needed 32.50 mL of 0.09486 M NaOH to neutralize where 1.05 mL of 0.1015 M HCl was used
Determine the numbers of grams of iron could be produce from the 220. Grams of Fe3O4, assume that AL is present in excess?
A vertical spring having a spring constant of 1.86 N/m consists of a 0.32-kg mass joined to it, and the mass moves in a medium having a damping constant of 0.025 kg/s. The mass is released from rest
What is the estimated molarity of NaOH in this solution when the stock NaOH solution was prepared by dissolving the 40. g of solid NaOH in 10 L of solution.
A bungee jumper of 89 kg is enjoying an afternoon of jumps. The first oscillation of jumper consists of amplitude of 14 m and a period of 4 s. Treating the bungee cord as a spring with no damping,
A sample which is having .305 g of potassium hydrogen phthalate was dissolved in the 25.00 mL of distilled water. If 15.00 mL of a stock NaOH solution were needed to totally react all the p
If 2.54 grams of S are reacted with the oxygen, determine the volume of SO2 gas produced at the 30.5 degrees C and1.12 atm.
The piston then moves up and down, driven through a force given by (27.0 N) cos [(17.1 Hz)t]. (i) Find out the maximum displacement from its equilibrium position which the mass can reach?
A point charge having 5.1 μC is positioned at the center of a sphere having a radius of 7 cm. The Coulomb constant is around 8.98755 × 109 Nm2/C2, and the acceleration of gravity is 9.8 m/s
Under the same conditions of pressure and temperature, 9.56 mL of a mixture of CO and CO2 effuse through the hole in the same amount of time. In 2.00 min, 28.7 mL of He effuse through a small hol