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A student develops a TLC plate without replacing the top of the developing chamber. How does this omission affect the development of the TLC plate?
A 61 ice cube can slide without friction up and down a 29 slope. The ice cube is pressed against a spring at the bottom of the slope, compressing the spring 12. The spring constant is 24. When the i
A peroxidase enzyme isolated from human red blood cells was foundto contain 0.29% selenium. What is the minimum molar mass of the enzyme?
A ball thrown vertically from ground level is caught 3.0 s later when it is at it's highest point by a person on a balcony which is 14 m above ground. Determine the initial speed of the ball.
A well insulated storage tank of 60m3 contains 200 L of liquid water at 75 deg C. The rest ofthe tank contains steam in equilibrium with the water. Spent process steam at 2 bar and 90 percent qualit
How far will the electron travel from its initial position at t = 0 before it stops?
What changes (if any) occur to the capacitance, the potential difference between the plates, the charge on each plate, and the electric field between the plates? Explain. (Recall that the magnitude
If not, why not? (Recall that the capacitance of a parallel- plate capacitor is given by eDA=d, where eD is the permittivity of free space, A is the area of each plate, and d is the separation betwe
At a typical location in the United States, the earth's magnetic field has a magnitude of 5.0×10^-5 T and is at a 65 degree angle from the horizontal. What is the flux through the 25cm x 30cm
There are 3 substrate molecules and 1 enzyme molecule. Usig the Markov chain formalism write a transition matrix that will dteremine the probability after n cylces that two molecules are product an
This block is connected by a horizontal string to a second block of mass m_2 = 2.10 kg on the same surface. The coefficient of kinetic friction is mu_k = 0.25 for both blocks. What is the accelerati
You have a symmetric double concave lens with power D = -2 per meter. a) Determine the radius of curvature and the principle planes (assume a 1mm vertex separation).
A salt bridge used between copper nitrate and zinc nitrate was soaked with a saturated ammonium nitrate solution. In which direction do the ammonium ions move when the salt bridge completed to
Choose the origin to be at the location where the bullet begins to move. Then the force (in newtons) exerted by the expanding gas on the bullet is 15000 + 10000x - 25000x^2, where x is in meters. (
An iron bolt of mass 55.0 g hangs from a string 34.1 cm long. The top end of the string is fixed. Without touching it, a magnet attracts the bolt so that it remains stationary, but is displaced hor
Mothballs are composed primarily of the hydrocarbon naphthalene (C10H8). When 1.025 g of naphthalene is burned in a bomb calorimeter, the temperature rises from 24.25 C to 32.33 C.
A 23.11 kg child bounces on a pogo stick. The pogo stick has a spring constant 17044 N/m. When the child makes a nice big bounce, she finds that at the bottom of the bounce she is accelerating upwar
A 66.1 kg student is standing atop a spring in an elevator that is accelerating upward at 3 m/s2. The spring constant is 2321 N/m. By how much is the spring compressed?
Consider the mixed aldol condensation reaction of acetophenoneand 2,2,5,5-tetramethylcyclopentanone in the presence of sodium hydroxide.
A satellite of mass 5600 kg orbits the Earth and has a period of 6200 s. A) Determine the radius of its circular orbit.(meters) B) Determine the magnitude of the Earth's gravitational force on the sat
How can an equilibrium system contain small and unchanged amounts of product, yet have large amounts of the reactant? What can yousay about the relative size of Keq for such an equilbrium?
A spring stretches 7.2 cm when a 0.39 kg block is hung from it. If a 0.87 kg block replaces the 0.39 kg block, how far does the spring stretch?
What is the wavelength in nm of the radiation emitted when anelectron in hydrogen atom moves from the ni = 5 level tothe nf = 3 level?
Consider the following reaction:Ni2+(aq) +Sn(s)-> Ni(s)+Sn2+determine the minimum ratio of the tin ion to the nickel ion necessary to make the reaction spontaneous as written.
Find the concentration of calcium ions in a solution made by adding3.50 g of calcium fluoride to 750. mL of 0.125 M NaF. [ForCaF2, Ksp = 3.95 ×10-11