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When a 2.90-kg object is hung vertically on a certain light spring described by Hooke's law, the spring stretches 2.76 cm. (a) What is the force constant of the spring?
How many ways can we use to connect 4 resistors in a circuit that has a certain value of circuit current, which is somewhere between least and the max. current meaning (Series-Parallel Circuit).
It takes 16.6 min for a 10.0-mLsample of an unknown gas to effuse through a pinhole. A 10.0mL sample of helium, He, required 5.00min. What is the molecular weightof the unknown gas (in g/mol)?
If all of the energy from the decay of 40K in your body could be captured and converted into electricity, how many "radioactive"people would be required to power a 100 W light bulb? 40K isa b- emitt
Calculate the Chloride concentration of the resulting solution.When 20.0 mL of 0.100M of NaCl is mixed with 30.0 mL of 0.200M CaCl2? Assume that the volumes are additive.
If the sodium hydroxide in the problem above is added to 50.00 mLof .118M Hydrochloric acid, how many moles of hydrochloric acid remain?
A cosmic ray proton in interstellar space has a kinetic energy of 10.0 MeV and maintains a circular orbit having a radius equal to that of Mercury's orbit around the sun, which is 5.80 x 10^10 m. Wh
How would you express this wavelenght in microns? Where is the wavelenght with respect to the center of the wavelenght distribution of the sun's radiation?
A solenoid surrounds the TPC and creates a uniform magnetic field in the z direction. The field points from right to left and has a magnitude of 0.5 T. It terminates outside the outer field cage and
An 80-proof brandy is 40.0% (v/v) ethyl alcohol. The "proof" is twice the percent concentration of alcohol in the beverage. How many milliliters of alcohol are present in 750mL of brandy?
When Lois is at a height h = 5.00 m from the ground (point B), Superman comes to the rescue and provides an upward force F so that she reaches the ground (point C) with zero speed. a. Use the work-k
A baseball player hits a homerun , and the ball lands in the left field seat, 7.5m above the point at which it was hit. The ball lands with a velocity of 36m/s at an angle of 28 degrees below the ho
A singly ionized oxygen atom moves at 9100 m/s in a circular path perpendicular to a 0.60 T magnetic field. Find the radius and period of its circular motion.
Identities of the components in a mixture may be determined by atechnique called spiking. Suppose you had run a gas chromatogram onyour product and had then deliberately added a drop of a known samp
The radioactive isotope Iodine-123 (123I) is used inmedical diagnosis and treatment. A gamma ray emitted by an atom of123I has an energy of 0.159 MeV. (1 MeV is 1 x106 eV and 1 eV = 1.6022 x 10-1
A motorcycle has a constant speed of 20.0 m/s as it passes over the top of a hill whose radius of curvature is 148 m. The mass of the motorcycle and driver is 340 kg. (a) Find the magnitude of the c
You are actually measuring the magnetic field produced by all four sides of the loop of wire.
The temperature of the Sun's surface is 5800 K. Calculate the relative number of hydrogen atoms in each of the first three electronic states at this temperature. Don't forget the degeneracies of the
If angular momentum is conserved for a propeller driven plane, it seems that if the propeller is turning clockwise, the airplane should be turning counter clockwise. Why doesn't this occur?
A 45.0 hollow copper cylinder is 90.0 long and has an inner diameter of 1.0 cm. The current density along the length of the cylinder is 1.50×105 . What is the current in the cylinder?
A 5.00-kg steel ball is dropped onto a copper plate from a height of 10.0 m. If the ball leaves a dent 3.20 mm deep, what is the average force exerted by the plate on the ball during the impact?
Manganese has a body-centered cubic unit cell and has a densityof 4.68 g/cm3.From this information, determine the length of the edge of the cubic cell.
An object is 17 cm in front of a diverging lens that has a focal length of -11 cm. How far in front of the lens should the object be placed so that the size of its image is reduced by a factor of 1.
A block of wood (M block = 5.2 kg) rests on a horizonal surface for which the coefficient of kinetic friction is 0.28. A bullet (m bullet = 32 g) is shot along the horizontal direction and embeds in
15.0 moles of gas are in a 8.00 tank at 20.2. Calculate the difference in pressure between methane and an ideal gas under these conditions. The van der Waals constants for methane are a=2.300 L^2* a