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A proton accelerates from rest in a uniform electric field of 620 N/C. At some later time, its speed is 1.4e6 m/s. (a) Find the magnitude of the acceleration of the proton.
Naturally occurring iodine has an atomic mass of 126.9045. A sample of 12.3849g gets contaminated with 1.00070g of a synthetic iodine with a mass of 128.9050. Find the apparent "atomic mass of the
A metal sphere weighing 18.48g is added to 20.00mL of water in a graduated cylinder. If the density of the metal is 4.50g/mL, what will be the new level of water in the graduated cylinder?
A river of width 32 m flows in a straight line (the x direction) with a speed of 0.25 m/s. A boat is rowed such that it travels directly across the river (along y). If the boat takes exactly 2.5 min
The octapeptide AVGWRVKS was digested with the enzyme trypsin. Would ion exchange or molecular exclusion be most appropriate for the separation?
How many grams of boric acid, B(OH)3 should be used to make 2L of 0.05M solution? What kind of flask would be used to prepare this solution?
(a) If you compress the air trapped in the piston by pushing on the syringe's plunger with an average force of 2.0 N for a distance of 0.55 cm, how much mechanical work do you do on the gas? (b) Wh
An airplane has a velocity relative to the air of 194 m/s in a westerly direction. If the wind has a speed relative to the ground of 56 m/s directed to the north, what is the speed of the plane rela
When a resistor is connected to a 10V source, it draws a 185mA current. The same resistor connected to a 96V source draws a 1.10A current. What is the rate of Joule heating in this resistor in both
How many 103 W lightbulbs can you use in a 103 V circuit without tripping a 14 A circuit breaker? (The bulbs are connected in parallel, which means that the potential difference across each lightbul
A cyclotron accelerates two protons directly toward eachother, each with a speed of 850 km/s, measured relative to the earth. A.) Find the maximum electric force that these protons will exert on each
A sample of the active ingredient in a nutritional mineral supplement was found to contain 0.0392 moles of iron, 0.0393 moles of sulfur, and 0.157 moles of oxygen atoms. What is the empirical formu
Water and diethyl ether are immiscible liquids. Charged compounds dissolve in water and uncharged compounds dissolve in ether. Given that benzoic acid has a pKa of 4.8 and cyclohexylamine has a pKa
A ray of light strikes a flat block of glass (n = 1.50)of thickness 2.00 cm at an angle of 1/6 radian with the normal . Trace the light beam through the glass, and find the angles of incidence and r
In general, the attractive intermolecular forces between solvent and solute particles must be comparable or greater than solute-solute interactions for significant solubility to occur.
Each vehicle maintains a constant velocity after reaching its cruising speed. By what maximum distance does the bicycle lead the car?
If a storage container has dimensions of 11.6ft X 9.8ft X16.2 ft and it is filled with nitrogen gas at a density of 4.57 g/L, what is the mass inpounds of the nitrogen gas in the container?
A 40 cm diameter loop is rotated in a uniform electric field until the position of maximum electric flux is found. The flux in that position is measured to be 5.1 105 N·m2/C. Calculate the el
Many metallic catalysts, especially precious metal catalysts are deposited as thin films on materials with a very high surface area. Why is this an effective way of utilizing the precious metal? (Ex
What is the magnitude of the electric field 2 cm from the center of the surfaces? Answer in units of N/C.
Coliform bacteria (for example, E. coli) are excreted in large numbers in human and animal feces. Water that meets a standard of less than one coliform per 100 mL is considered safe for human consum
What would be the saturation concentration (mole/L) of oxygen (O2) in a river in winter when the air temperature is 0°C if the Henry's law constant at this temperature is 2.28 × 10-3 mole/
A hammer thrower accelerates the hammer (mass = 7.30 kg) from rest within four full turns (revolutions) and releases it at a speed of 25.0 m/s. Assuming a uniform rate of increase in angular velocit
While in a third floor office building, you notice a ball moving straight upward just outside the window. It takes 0.17 s for the ball to move up a distance of 1.00 m from the bottom to the top of
A 12-in record is dropped on a large 12-in phonograph turntable that is freely turning at 37 rev/min. The mass of the record is 63 g and the mass of the turntable is 1.19 kg. What is the final speed