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A torsion pendulum is made from a disk of mass m = 5.7 kg and radius R = 0.67 m, What is the torsion constant of this pendulum
an insulated container holds 475g of molten indium (liquid) at a temperature of 276 C. if 511g of solid indium are warmed to the melting point (157 C) and than dropped into molten indium, the system
A 1g plastic pellet is accelerated by an electirc field of 1000V/m over a gap of 12 cm, What is the velocity of the pellet after crossing the gap
In a tripeptide of Lys-Glu-Arg, would you predict that the pKa of the middle Asparate to be lower, higher, or unchanged
How many grams of sodium nitrite must be added to a 75.0 mL of 0.050M nitrous acid (Ka=4.5 x 10^-4) to create a solution that has a final pH of 4.20 (assume no volume change)
The atomic mass of Potassium 39 is 38.96371 AMU. Calculate the binding energy for a mass of this nuclide using 1.008665 AMU for the mass of the neutron, 1.007276 AMU for the mass of the proton, 0.00
Two motorcycles are traveling in opposite directions at the same speed when one of the cyclists blasts his horn, what is the speed of the motorcycles
What is the pH of a solution of 0.050M formic acid(HCO2H, Ka=1.8*10^-4) and 0.035M sodium formate
A child playing tee ball hits a stationary 60g ball with a 220g bat swinging initially at 4.0m/s, What's the bat's post-impact speed
The nucleus in an iron atom has a radius of about 4.0 X 10-15 m and contains 26 protons, What is the magnitude of the gravitational force between those same two protons
A certain atom is bombarded with a neutron and changes into Lithium 7. What was that atom? (It is a fission reaction)
An unknown substance is empirically determined to be 40.00 percent carbon by weight, 6.67 percent hydrogen, and 53.33 percent oxygen. its molecular weight is roughly 55g/mol. determine the molecular
In a simplified model of a hydrogen atom, the electron moves around the proton nucleus in a circular orbit of radius 0.53 × 10^?10 m, Determine the period of the circular motion
An electron field of 8.50e5 V/m is desired between two parallel plates each of area 45cm^2 and seperated by 2.45 mm of air
Length A is measured to be 7.5cm±0.3 cm and length B is 7.0cm±0.6cm. What is the difference between the two lengths, LB - LA
If the inital and final volume readings from a buret are 0.27mL and 28.34mL, respectively, what is the volume dispensed from the buret? What is the volume per drop if 574 drops were dispensed
Let's build a helium atom. Start with a nucleus with 2 protons and 2 neutrons, Calculate the energy gained by the system constructing this atom
A titration experiment is set up to use 0.235M bleach (NaOCl) to analyze CrO2-. If 50.0mL of the CrO2-(aq) solution required 37.75mL of bleach to react to completion, what would you calculate as the
Titration of 25.00 mL of HCl requires 15.62 mL of 0.250 M Ba(OH)2. Determine the concentration of the HCl solution
Lightning can be studied with a Van de Graaff generator, which consists of a spherical dome on which charge is continuously deposited by a moving belt, What is the maximum charge on the dome
A 1-L flask is filled with 1.20g of argon at 25C . A sample of ethane vapor is added to the same flask until the total pressure is 1.15 atm. A) What is the partial pressure of argon, P Ar , in the fl
An aqueous solution contains a mixture of Cl- and I-. A buret is used to slowly add a solution of Ag+. Will AgCl or AgBr precipitate first
An electric dipole of dipole moment 4.5 x 10-9 C·m is in a 250 N/C electric field, what is the potential energy
Determine the concentrations of Ag+ and C2O4- in a saturated aqueous solution of Ag2C2O4. Ksp = 3.5 x 10-11
A spherical shell of radius R = 8.0 cm has a total charge Q = - 900nC uniformly distributed on its surface, Write the net electric field at the point P in unit vector notation