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Experiments show that it takes 1656 kJ/mol to break all the boundsin methane ( CH4) and 4006 KJ/mol to break all the bonds in propane(C3H8) .Based on these data , calculate the average bound enthalp
A block is released from rest when the spring is stretched a distance d. If k = 50 N/m, m = 0.50 kg, d = 10 cm, and the coefficient of kinetic friction between the block and the horizontal surface i
Find the area of the triangle enclosed by the graph of f(x), the x-axis and the y-axis. express your answer in terms of just b.
A cart of mass 2.3 kg is moving with a velocity of 15.2 m/s. It makes a head-on perfectly inelastic collision with a stationary cart B with mass 8.1 kg causing them to travel with a velocity 10.94 m
A rancher has 12 milesof fenching to fence a rectangular pieve of grazinglang along a straight river. Find the dimensions of the rectangle that has the largest possible area.
Clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. What is the minimum rotational frequency in rpm, for which t
Find end the domain and range of x and express in interval notation and find all values of x at which the graph of f(x) is discontinuous.
Suppose a patient is given 155 mg of I-131, a beta emitter with a half life of 8.0 days. Assuming that none of the I-131 is eliminated from the person's body in the first 4.0 hours of treatment, wha
An astronaunt of mass 67.3 kg is on a space walk to repair a communications satellite. Suddenly she needs to consult her physics book so you throw it to her with speed 7.1 m/s relative to your space
A 4.78-g sample of aluminum completely reacts with oxygen to form 6.67 g of aluminum oxide. Use this data to calculate the mass percent composition of aluminum in aluminum oxide.
An electron moves in a circular path perpendicular to a constant magnetic field with a magnitude of 2.50 mT. The angular momentum of the electron about the center of the circle is 3.00 x 10-25 J&mid
The rock in a particular iron ore deposit contains 83 %Fe2O3 by mass. How many kilograms of the rock must be processed to obtain 1300 kg of iron?
Fingernail-polish remover is primarily acetone(C3H6O). How many acetone molecules are in abottle of acetone with a volume of 405 mL? (density of acetone =0.788 g/cm3 ).
After the collision, puck A has a velocity of 0.120 m/s to the left, and puck B has a velocity of 0.580 m/s to the right. Calculate the change in the total kinetic energy of the system that occurs dur
Using a context of quadratic functions and their graphs, explain the concept of optimization to someone without a background in mathematics.
What is the approximate yield strength of a copper silica alloy which has spherical precipitates of silica of average radius 100 nm. The volume fraction of silica is 1%, the shear modulus is 4.2 &ti
A 1.45 g sample of phosphorus burns in air and forms 2.57 g of a phosphorus oxide. Calculate the empirical formula of the oxide. Express your answer as a chemical formula.
You spent a lot of time during this unit working with linear functions. For which of the following situations would a linear function be a reasonable choice for a mathematical model?
The energy of formation of a vacancy in copper is 1eV. what is approximate relative change in the density of copper due to vacancy formation at a temperature just below its melting point (1356K)
A paper chromatograph is run for a solute that has a strong affinity for the solvent , and very little affinity for the paper. when properly developed, will the Rf for the solute benearly one , near
When a dislocation passes right through a crystal slip equal to a lattice spacing occurs. Estimate the number of dislocations on the (111) plane which would be needed to produce 5% plastic deformati
What is the displacement (magnitude and direction) of the 2nd airport from the 1st airport? Roud your final answers to 3 decimal places.
A 1.0-cm-diameter microscope objective has a focal length of 2.8 mm. It is used in visible light with a wavelength of 550 mm. A. What is the objective's resolving power if used in air?
Find , the coefficient of static friction between the rod and the rails.
How long will it take the insect population to grow to nine times its initial size? Simplify your answer as much as possible.