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Two lenses, one converging with focal length 21.0cm and one diverging with focal length ? 10.0cm , are placed 25.0?cm apart. Find the final image distance from second lens
Methylamine (CH3NH2) is a weak base. In a 0.100 M solution, 6.30% of the base is ionized. What is its Kb
Two different wavelengths of monochromatic light are projected through the same double slit. First a 490 nm light is projected, calculate the unknown wavelength
The pH of a 0.100 M formic acid solution (HCHO2) is 2.38 at 25 °C. Determine the Ka and pKa of formic acid
33g of copper pellets are removed from a 300?C oven and immediately dropped into 100mL of water, What will the new water temperature be
Estimate the temperature needed to achieve the fusion of deuterium to make an alpha particle. The energy required can be estimated from Coulomb's law
If this lens is then immersed in water with a refractive index of 1.33, what will the focal lens of the lens be in this environment
This method assumes that no argon was trapped in the rock when it was formed frothe molten material. A meteorite was found to have equal amounts of 40K and 40Ar. a) Of the potassium-40 that was orig
A 3.4 kg piece of aluminum at 28°C is placed in 1.0 kg of water in a Styrofoam container at room temperature (20°C)
Draw the structures of [Co(NH3)6]Cl3 and [Co(NH3)5Cl]Cl2. Explain the difference between the chlorides in [Co(NH3)6]Cl3 and [Co(NH3)5Cl]Cl2
A uniform rod of mass 2.65×10?2kg and length 0.450m rotates in a horizontal plane about a fixed axis through its center, find the angular speed of the rod after the rings leave it
On a pleasure cruise a boat is traveling relative to the water at a speed of 4.94 m/s due south. find the magnitude of the passenger's velocity relative to the water
The dow process isolates magnesium from molten MgCL2. How many moles of electrons are required to convert 54.7g of magnesium
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0682 s, determine the vertical components of the launch velocity.
Write a balanced nuclear equation for the following: The nuclide bismuth-214 undergoes alpha emission to give thallium-210.
A golfer hits a shot to a green that is elevated 3.20 m above the point where the ball is struck. find the speed of the ball just before it lands
If the charge calculated in the first part of this question is passed through a cell constructed of copper electrodes immersed in an acidic solution of copper sulfate (0.5 M CuSO4/0.1 M H2SO4), what
A reaction has ?G = 10.0 kJ and ?G° = 15.0 kJ at a temperature of 50 °C. Calculate the value of the reaction quotient Q under these conditions.
A factory worker accidentally releases a 200 kg crate that was being held at rest at the top of a ramp that is 3.9 m long, How fast is the crate moving as it reaches the bottom of the ramp
Determine the number of signals expected in the carbon 13 spectra for each of the following compounds. propyl benzene and 1,2,4 trimethyl benzene
description of Ramesses the Great's tomb in the Valley of the kings - Describe the reigns of Ramesses I through II
How is it possible that hard water can also be very saline ie The River Murray in South Australia? If sodium is added to soften hard water, then wouldn't the presence of salt in hard water 'soften'
A laser is mounted on a table 1.00m above the ground, pointed at a vertical mirror a horizontal distance 3.48maway. At what height does the reflected beam strike the wall
Two long, parallel wires are separated by a distance of 2.50cm . The force per unit length that each wire exerts on the other is 3.20×10?5N/m, determine the current in the second wire