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A telephoto lens consists of a converging front lens of focal length f1 and diverging back lens of focal length f2 separated by a distance d. Compute the effective focal length of the lens system
what is the minimum amount of 6.0 M H2SO4 necessary to produce 25.0 g of H2 according to the reaction between aluminum and sulfirc acid 2Al + 3H2SO4 ---> Al(SO4)3 + 3H2
The magnetic field in the region between the poles of an electromagnet is uniform at any time, but is increasing at the rate of 0.060 T/s. What is the magnitude of the induced emf
Calculate the pH at equivalence point when 40.0 ml of 0.50 M aniline is titrated with 30.0 ml of 0.67 M HBr. For aniline Kb=3.8x10exp-10 thanks answer should be pH=2.85
a moving rod is observed to have a lenght of 2m and to be oriented at an angle of 30 degrees with respect to the direction of motion. what is the orentation angle in the proper frame
Two equal, but oppositely charged particles are attracted to each other electrically. evaluate the magnitude of the charges
when a photoelectric surface is illuminated with f 437 nm , the stopping potential 1.67 v, what is the maimum speed of the ejected electrons
a double-slit arrangment prduce bright interference fringrs that are seprated by 2.60 mm when the wavelengt is 589nm. what is the bright fringe separation
an electron in a hydrogen makes a transition between levels and emits a photon with a frequency of 6.91*10^14 hz . find is the electron jumping to higher or lower level
The isotope 226 Ra Alpha decays. its measured atomic mass is 226.02541 amu, the daughter nucleus has a mass of 222.01758 amu and helium has atomic mass 4.0026 amu. calculate the kinetic energy of th
An archaeologist uses carbon dating to find the age of some ancient fossils. Determine the fossil age
If we imagine an electron as orbiting the proton, with the orbit of radius 5 x 10 ^-11 m, what is the total energy of the atom
Determine the pH of an HF solution of each of the following concentrations: a) 4.60 x 10^-2 b) 2.30 x 10^-2
The specific heat of aluminum is 0.902 J at 25C. How much heat, in kJ, does it take to raise the temperature of a 12.0 g chunk of aluminum from 15.5C to 35.5C
You throw a ball straight down from an apartment balcony to the ground below. find the height of the balcony
A block slides down an inclined plane, starting from rest and being pushed with a constant acceleration of 5.35 m/s2 over a distance of 18.8 cm. Find the total time the block is in motion
Calculate the equilibrium constant for the chemical system described by the following chemical equation: 4 Al (s) + 6 Ni2+ (aq) <-> 4 Al3+(aq) + 6 Ni(s) The 2+ and 3+ indicate charge. How do y
a molten plastic flows out of a tube that is 8.0 centimeters long at a rate of 13cm^3/min, find the viscosity of the plastic
A fictional spaceship accelerates at a constant rate of 0.104 m/s2. How long would it take to reach the moon, 4.08 108 m away
The brakes are applied to a car traveling on a dry, level highway. A typical value for the magnitude of the car's acceleration is 4.55 m/s2. how long does it take to stop and how far does it travel
Styrene is produced by catalytic dehydrogenation of ethylbenzene at high temperature in the presence of superheated steam. A.) Given the following data, what is the delta Hrxn, delta Grxn and delta
A rod moving in the positive x direction is measured by a stationary observer to have a length of 10.0meters, Find the speed of the second observer as measured by the stationary observe
Calculate the pH at equivalence point when 40.0 ml of 0.50 M aniline is titrated with 30.0 ml of 0.67 M HBr. For aniline Kb=3.8x10exp
A Tritium (3 1 H) nucleus with kinetic energy of 4.70 MeV is incident on a stationary target of phosphorus (30 15 P); Find the nuclear binding energy of the nucleus 32 16 S
a popgun uses an ideal spring for which k=2000N/m. how high can the gun shoot a 5.0gram projectile