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If the ball is in contact with the wall for 0.0122 s, what is the average magnitude of acceleration of the ball while it is in contact with the wall?
2 mL of heptane plu 2 mL of alpha pinene give 4 mL of solution. Howmany grams per mL are in that mixture? Suppose you diluted 0.25 mLof the 50:50 heptane/alpha-pinene mixture to 5 mL with solvent an
What if both are heated together, what temperature must they both reach so that the ring just slips over the rod? Would this latter process work? [coefficient of linear exp for alum is 2.4 e-5, for
A 40-year-old manager, at a prominent legalfirm in L.A., experiences abdominal pain post lunch. He goes to therestroom a couple of times, but continues to experience pain andcramps.
The amplitude decreases to 1.087 cm in 4.57 s, what is the damping constant for the system?
A hiker caught in a thunderstorm loses heat when her clothingbecomes wet. She is packing emergency rations which if completelymetabolized will release 30kJ of heat per gram of rations consumed.
A uniform circular disk whose radius R is 50.5 cm is suspended from a point on its rim. At what radial distance r < R is there a point of suspension that gives the same period?
A large solar panel on a spacecraft in Earth orbit produce 1.0kW of power when the panel is turned toward the sun. What power would the solar cell produce if the spacecraft were in orbit around Satu
Many gases are shipped in high pressure containers. Consider asteel tank whos volume is 65L and which contains O2 gas at apressure of 16,500 KPa at 23 degrees celcius.
A bomber on a bomb run is traveling at a horizontal velocity of 152 meters per second, and flying at an altitude of 1500 m. Find the time the bomb will take to fall.
The ratio of the velocity of the object, at a very large distance from the planet, to the escape velocity for the planet is closest to:
Your stomach is a chemical reactor. When you consumea fast food $0.99 hamburger in about a minute, it acts like aninstantaneous input of 325 g of food entering the stomach.
An ionic compound forms when calcium (Z = 20) reacts withiodine (Z = 53). If a sample of the compound contains 1.4x 1019 calcium ions, how many iodide ions does it contain?
What velocity and heading will the swimmer have to use to get 50 meters upstream from directly across the river in 19.4 seconds?
In the model of heptane where the chain is fully extended andanother model been its mirror image . Are these two mirror imagessuperimposable?
A hydraulic press consists of two vertical cylinders of circular cross-sectional areas 6cm2 and 120cm2 that are joined at the base. The press contains oil of relative density 0.93, and the friction
When 15.12 mL of 0.1194M NaOH is added to 25.00 mL of 0.1246M HX (an unknown weak acid), the resulting pH is 5.9. What is the Ka of the unknown acid?
Additioonal Feat! Dexter and Mandark team up in order toprevent the asteroids from destroying Earth. They start thisplanet saving feat by weighing a gelatin capsule (0.117g) Next they add pieces of
Dexter and Mandark team up in order to prevent theasteroids from destroying Earth. They start this planet savingfeat by weighing a gelatin capsule (0.117 g) Next theyadd pieces of aluminum/zinc allo
Calculate the molecular formula of diazomethane, assuming thecompound is 28.6% C, 4.8% H, and 66.6% N by mass and the density ofthe gas is 1.72 g/L at 250C and 1.00 atm.
Assume your are given a brain which weighs 1.45 kg andcontains 7.70e10 cells. If each cell was a cube, and had a densityof 1.0 g/mL
How would you not tell the difference between the three? Usinig the technique in the lab (we measured the samequantities of water using two different measuring devices andcompared them using a t tes
Americium-241 is used in smoke detectors. It has a rate constant for radioactive decay of k =1.6x10-3yr-1. How much of a 1.00-mg sample of Americium-241 remains after three half-lives?
What is the maximum solubility of ferrous ion in an anaerobicpH 10 solution containing 10-6 M sulfide(S2-)? Will FeS or Fe(OH)2 precipitatefirst?
A laser emits a pulse of light containing 7.99 ×10-15 J of energy at a frequency of 3.32 ×1015 Hz. How many photons are present in the pulse?