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A web page designer creates an animation in which a dot on a computer screen has a position of r? =[ 4.2cm +( 2.3cm/s2 )t2]i^+( 4.5cm/s )tj^
A certain indicator, HA, has a Ka value of 0.000040. The protonated form of the indicator is yellow and the ionized form is red. What is the pKa of the indicator
The fastest measured pitched baseball left the pitcher's hand at a speed of 42.0m/s. what acceleration did he give the ball
Two particles are fixed to an x axis: particle 1 of charge -4.18 × 10-7 C is at the origin and particle 2 of charge +4.18 × 10-7 C is at x2 = 13.9 cm. what is the magnitude of the net el
Two tiny spheres have the same mass and carry charges of the same magnitude. The mass of each sphere is 5.04 10-6 kg. Determine the charge magnitude
A "rocket car" is launched along a long straight track at t = 0 s. It moves with constant acceleration a1 = 1.2m/s2. At what time does the second car catch up with the first one
What is the solubility of M(OH)2 in pure water. B. What is the solubility of M(OH)2 in a .202 M solution of M(NO3)2? Ksp=5.45E-18
a spring of stiffiness k supports a box of mass M in which is placed a blokk of mass m. find the force of reaction between the blook and the box
Red light of wavelength 633nm from a helium-neon laser passes through a slit 0.370mm wide. What is the width of the central bright fringe
When jumping, a flea reaches a takeoff speed of 1.0m/s over a distance of 0.48mm. how high would he go
The half-equivalence point of a titration occurs half way to the end point, where half of the analyte has reacted to form its conjugate, and the other half still remains unreacted. If 0.560 moles of
A container of gas with an adjustable volume has an initial pressure of p. The container volume is tripled at constant temperature. What is the pressure inside the container after the volume is incr
Suppose that 2.0mol H2 at 2.0atm and 25C and 4.0mol N2 at 3.0atm and 25C are mixed at constant volume. Calculate delta mix G. Also, what would be the value of delta mix G had the pressures been iden
You clamp a straight ramp of length 51 cm making an angle of 18.0° with the horizontal table top, What time elapses from when the car leaves the ramp until it reaches the floor
What three events occur during the light reactions of photosynthesis. A. Reduction of oxygen, oxidation of NADPH, formation of ATP B. Oxidation of water, reduction of NADP+
In the intermembrane space, attached to the inner mitochondrial membrane. C. In the intermembrane space, attached to the outer mitochondrial membrane D. On the cytosolic side of the outer mitochond
A mitochondrion is producing ATP at a constant rate and, then, a chemical uncoupler is added. Compared to before the uncoupler was added
While running a marathon, a long-distance runner uses a stopwatch to time herself over a distance of 100. How long will it take her to run a mile at this speed
Given 217 mL of a buffer solution that is 0.46 M formic acid and 0.27 M sodium formate, calculate the pH of this solution after the addition of 2.8 mL of 6.3 M hydrochloric acid. The Ka of formic ac
The rear end of an air conditioner dumps 1.2 * 10^7 J/hr of waste heat into the air outside a building. A fan assists in the removal of this heat. With what temperature does the air emerge
What is the path these electrons use in the Electron Transport Chain? Answer A. Complex I, Complex II, Complex III, Complex IV, O2 to H2O B. Complex II, Complex III, Complex IV, O2to H2O C.
Calculate the pH of a solution made by dissolving 2.89 g of sodium fluoride and 17.1 mL of 0.309 M hydrofluoric acid in enough water to make 177 mL of solution.
The daily energy requirement for an active adult human is around 2500 calories per day. A nutritional calorie is equal to 4.2 kJ of energy. If each ATP contains -30 kJ/mol under standard conditions,
BIO Electric Potential across a Cell Membrane In a typical living cell, What is the magnitude and direction of the electric field within the cell membrane
Poisons such as sodium azide and sodium cyanide inactivate hemoglobin by irreversibly binding to the heme group of the molecule. These poisons also inactivate the electron transport chain.