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The naturally occurring isotope rubidium-87 decays by beta emission to strontium-87. This decay is the basis of a method for determining the ages of rocks.
Calculate the maximum work available from 36.0 g of aluminum in the following cell when the cell potential is 1.15 V. Note that O2 is reduced to H2O.
A capacitor is constructed from two square metal plates. A dielectric fills the upper half of the capacitor and a dielectric fills the lower half of the capacitor. Calculate the capacitance.
When a different particle with an electric charge of +4.10 x 10-12 C enters the velocity selector traveling east, the net force (due to the electric and magnetic fields) acting on it is 1.65 x 10-9 N
a.) What is the potential difference between the final and initial positions? Did the potential increase or decrease? b.) By how much did the potential energy of the proton change? Did it increase or
A proton is at the origin (x = 0, y = 0) at time t = 0 when it is moving with a velocity of 5.0 x 10^4 m/s in the positive y-direction. Ignore and non-electric forces. At some particular later time
To enter the main pool at an amusement part, a swimmer uses a water slide which has a vertical height of 2.73 m. Find her speed at the bottom of the slide if she starts with an initial speed of 0.95
a) What is the current density for this wire if the current is 6.1 Amp, and the radius is 5×10-4 m? b) What is the drift velocity for the electrons in this wire?
A 1.2 kg block is held at rest against a spring with a force constant k = 665 N/m. Initially, the spring is compressed a distance d.
A 1,420 kg boulder at rest, begins to roll down a 52 m long hillside. while rolling, the ground causes a frictional force of 12,040N. the boulder arrives at the bottom of the hillside with a speed o
Three gases (8.00 \rm g of methane, \rm CH_4, 18.0 \rm g of ethane, \rm C_2H_6, and an unknown amount of propane, \rm C_3H_8) were added to the same 10.0-\rm L container. At 23.0 ^\circ\rm C, the to
Determine the oxidation number of each element for the following substances and arrange these substances in decreasing order of strength as reducing agents at the standard-state conditions of concen
A point particle has a charge equal to +2.30 µC and is fixed at the origin. (a) What is the electric potential V at a point 3.40 m from the origin assuming that V = 0 at infinity?
How does an increase in temperature influence the equilibrium constant of a) an endothermic reaction and b) an exothermic reaction?
What is the frequency and wavelength of the electromagnetic radiation at this photon energy? What is the speed of the wave?
Nitrogen and Hydrogen are introduced into a vessel at partial pressures of 2.00 bar in each case. The two phases are allowed to come to equilibrium with their product ammonia in a vessel of fixed vo
A 0.060-H inductor is wired across the terminals of a generator that has a voltage of 2.5 V and supplies a current of 0.022 A. Find the frequency of the generator. Note: The ac current and voltage a
A force of 70.0 N is exerted at an angle of 30.0° below the horizontal on a block of mass 8.00 kg that is resting on a table. What is the magnitude of the normal force acting on the block?
Calculate the melting point of ice under a pressure of 10.0 MPa. Assume that the density of ice under these conditions is approximately 0.915 g/cm3 and that of liquid water is 0.998 g/cm3.
How much work must be done to bring three electrons from a great distance apart to 4.0×10-10 m from one another (at the corners of an equilateral triangle)?
The emission line used for zinc determinations in atomic emission spectroscopy is 214 nm. If there are 1.50×1010 atoms of zinc emitting light in the instrument flame at any given instant.
A +9.0 charge is located at 12 and a -3.0 charge is located 4.0. Where would a -10 charge need to be located in order that the electric field at the origin be zero? Enter your answers numerically se
A bead with a mass of 0.050 and a charge of 15 is free to slide on a vertical rod. At the base of the rod is a fixed 10 charge. In equilibrium, at what height above the fixed charge does the bead re
If the interplanar distance in the crystal is 287 pm, and the angle of maximum reflection is found to be 7.28^\circ, what is the wavelength of the X-ray beam?
A concave mirror has a focal length of 31.2 cm. The distance between an object and its image is 43.2 cm. Find (a) the object and (b) the image distance assuming that the object lies beyond the cente