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Magnesium metal has a specific heat of 1.04. A 70g sample of Mg at a temp of 99.8 degrees C is added to a beaker containing 50.0g of water at 30.0 degrees C. What is the final temperature.
Assuming that a drop is 0.05 mL, how many drops of a 0.10 M KI solution must be added to 100 mL of 0.010 M Pb(NO3)2 to just get aprecipitate to form? (That is, how many drops of KI are required
A thin nonconducting spherical shell of radius 6 cm carries a uniform surface charge density s = 8 nC/m^2. (a) What is the total charge on the shell? (in nc)
A small loop of wire of radius 1.7 is placed at the center of a wire loop with radius 27. The planes of the loops are perpendicular to each other, and a 6.0 current flows in each. a. Estimate the ma
A small convex mirror placed at the 20.0 cm position forms a final image at the 10.0 cm point. What is the radius of curvature of the convex mirror?
They each hear a frequency greater than 512 hz as the fork moves toward them; the difference in the frequencies they hear is 6.84 hz. Determine their respective distances below the overpass. The spe
(a) At the top of the hill, what is the normal force (using the negative sign for the downward direction) FN on the car from the track if the car's speed is v = 9.7 m/s? (b) What is FN if v = 18 m/s
The density of air is 0.48 kg/m3 at 8.3 km and 0.72 kg/m3 at 4.15 km. Assume that the airplanes have the same effective cross-sectional area and drag coefficient C.
A woman is pushing a sofa at constant speed of 1.0 m/s on a horizontal surface. She exerts a force of 80 N in the direction of the motion. a) How can the sofa move at constant speed without Newton's
A pea shooter can shoot a pea with a muzzle velocity of 8.25 m/s2 suppose the pea shot out horizontally with initial velocity from height = 1.48m above the ground. How far out along the ground will i
A particle is confined to a three-dimensional box that has sides L1, L2 = 2L1, and L3 = 3L1. Give wave function for the fifth excited state. (There are only five states that have energy levels below
A 15KW electric motor provides power for an elevator of a building. What is the minimum time needed for the elevator to rise 30 meters to the sixth floor when its total mass, when loaded, is 900Kg?
An insulating solid sphere of radius a has a uniform volume charge density and carries a total positive charge Q. Calculate the electric field at a) a point outside the surface, and b) at a point
Two infinitely long, straight wires are parallel and separated by a distance of 1.30 meters. They carry currents in the same direction. Wire 1 carries four times the current that wire 2 carries.
Pure benzene has a normal freezing point of 5.50 degrees C. A solution containing 11.4 grams of a molecuar substance dissolved in 150.0 grams of benzene (kf = 5.12 degrees c/m) has a freezing point
The magnetic field produced by the solenoid in a magnetic resonance imaging (MRI) system designed for measurements on whole human bodies has a field strength of 9.0 T, and the current in the solenoi
A coil carries a current and experiences a torque due to a magnetic field. The value of the torque is 91.5% of the maximum possible torque. (a) What is the smallest angle between the magnetic field
What is the hydroxide ion concentration of an aqueous 0.00370Mcaffeine solution? The most basic nitrogen atom in caffeine has aKb of 4.1x10-4
The magnitude of the net magnetic force experienced by the two-wire unit is 3.13 N. What is the current I?
0.300 moles of an unknown monobasic weak base are added 1.50L of water. The resulting solution has a pH 8.6. What is theKa of the conjugate acid of the unknown base? Assume no change in volume.
When the electric field is turned off, the charged particle travels on a circular path whose radius is 4.05 cm. Find the charge-to-mass ratio of the particle.
Determine the spatial separation between the two isotopes after they have traveled through a half-circle.
A reaction rate increases by a factor of 2470 in the presence of acatalyst at 32°C. The activation energy of the original, uncatalysed, pathway is 69kJ mol-1. What is the activation energy of th
To what value must the speed v of the rod be adjusted to reestablish the emf induced between the ends of the rod at its initial value?
Consider the structure of valinomycin, why can it transport ions across cell membranes and disrupt the ionis balance of the cell?