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Forgetful Freddy weighed his KHP sample, but forgot to bring his report sheet along, so he recorded the mass KHP on a paper towel. During his titration, which required 18.46 mL of base, he spilled s
Given a fixed area A, what should the rectangle look like if you want the required torque to be as large as possible? What is the upper bound on the torque?
A 3000 kg truck traveling north at 38 km/h turns east and accelerates to 54 km/h. (a) What is the change in the truck's kinetic energy?
A car is driven east for a distance of 41 km, then north for 21 km, and then in a direction 34° east of north for 25 km. Determine (a) the magnitude (in km) of the car's total displacement from
A certain batch of fireflies were observed to "flash" at the rate of 15.4 times per minute at 25°C, and at the lower rate of 5.1 times a minute at a temperature of 15°C.
Assuming that all the energy dissipated by kinetic friction goes into melting a small mass, m, of the ice, and the rest of the ice block remains at -1.5 degrees C, determine the value of m.
How far below the release point is the center of mass of the two stones at t = 800 ms? (Neither stone has yet reached the ground.)
What is the equilibrium concentration of fluorine if the initial concentrations of bromine and fluorine were 0.127 moles/liter in a sealed container and no product was present initially?
What angle does the resulting w make with the vertical? (If you want, you can check your answer by showing that the theta that make this angle maximum is sin^-1 (sqrt(7/9) = 61.9 degrees)
A bicycle has wheels with a diameter of 0.590 m. It accelerates uniformly and the rate of rotation of its wheels increases from 189 rpm to 270 rpm in a time of 21.1 s. Find the linear acceleration o
A circular coil of wire 8.20 cm in diameter has 15.0 turns and carries a current of 3.20 A . The coil is in a region where the magnetic field is 0.650 T. a) What orientation of the coil gives the ma
Calcium carbonate combines with HCL to produce calcium chloride, water, and carbon dioxide gas. Write a balance equation for this reaction. How many moles of HCL are required to reat with 2.5 moles
After completing a 90° right-hand turn to the positive x direction in 4.4 s, the inattentive operator drives into a tree, which stops the car in 340 ms. (a) In unit-vector notation, what is the
A 2 kg metal plate slides down a 20-meter high slope. At the bottom its speed is 11.8 m/s. To the nearest Joule, what was the magnitude of the work done by friction?
You plan to tighten the plugs by pulling on the end of a 30-cm-long wrench. Because of the cramped space under the hood, you'll need to pull at an angle of 105 degrees with respect to the wrench sha
The turntable is at rest initially, but when the person begins running at a speed of 3.3 m/s (with respect to the turntable) around its edge, the turntable begins to rotate in the opposite direction
The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.25 rad/s2. It accelerates for 28.7 s, then maintains a constant angular velocity. Calculate the to
The molecular mass of hemoglobin is 6.86*10^4 u. What mass of hemoglobin must be present per 100.0 ml of a solution to exert an osmotic pressure of 7.25 mmHg at 25 degrees Celsius?
The solenoid has 500 turns and is 0.3 m long. The current in the solenoid is increasing at a constant rate of 0.7 A/s. What is the current flowing in the square loop?
A solenoid of length 4.6 cm and diameter 0.75 cm is wound with 180 turns per cm. The current is decreasing at a rate of 35.0 A/s. (a) What is the induced emf in one of the windings?
Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. The osmotic pressures required for this process can be as high as 18.1 atm.
If the ball leaves his club with a velocity of 43m/s at an angle of 40.0 degrees to the ground, find the time for the ball to come down on the green, and the speed of the ball just before impact. Al
If all rays striking the interior walls of the pipe with incident angles greater than 60 degree are subject to total internal reflection, what is the index of refraction of the coating?
Based on the trends in ionization energies for the alkali metals which would you expect to undergo the most exothermic reaction with chlorine gas? Write a balanced chemical equation for the reactio
A two-component mixture is analyzed by gas chromatography with flame ionization detection. Compound X has a retention time of tR = 5.83 min with N = 7080 theoretical plates, and compound Y has a ret