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In moving a 38.0 desk from one side of a classroom to the other, a professor finds that a horizontal force of 285 is necessary to set the desk in motion, and a force of 190 is necessary to keep it i
The velocity of propagation of a transverse wave on a 2-m long fixed at both ends is 200 m/s. Which one of the following is not a resonant frequency of this string?
Why has the dehydration of cyclohexanol to cyclohexene been the traditional experiment to illustrate the acid-catalyzed dehydration of an alcohol to an alkene?
A mass attached to the free end of an ideal spring excutes SHM according to the equation x = 0.5 Sin 20t where x is in meters and t is in seconds. What is the magnitude of maximum acceleration for t
You are expected to use 35 square centimeter piece of aluminum froma used beverage can. What is the average thickness of such beveragecans if you have 1.00gram of metal from this piece ?
What is the smallest amount of work that must be done on the electron to move it from its circular orbit, with a radius of , to an infinite distance from the proton? This value is referred to as the
A wire carries a current of 10 A in the +x direction in a uniform magnetic field of 0.40 T. Find the magnitude of the force per unit length and the direction of the force on the wire if the magneti
(a) Find an expression for the position of the particle as a function of time. (Use the following as necessary: t, and p.) (b) Determine the maximum speed of the particle.
What volumes of equimolar aq soloutions of K2HPO4 and KH2PO4 must you combine to make a 900ml solution of the PH of 7.00 buffer?
We define its position as x = 0. The object is pulled down an additional 16.5 cm and released from rest to oscillate without friction. What is its position x at a moment 84.4 s later? (b) Find the
A wood block, after being given a starting push, slides down a wood ramp at a constant speed. What is the angle of the ramp above horizontal? Also wood -on-wook kinetic friction coefficient µk=
The left-hand electrode makes use of the complete oxidation of methane to carbon dioxide and water; the right hand electrode makes use of the partial oxidation of methane to carbon monoxide and wate
An airplane propeller is 2.20 in length (from tip to tip) with mass 124 and is rotating at 2300 () about an axis through its center. You can model the propeller as a slender rod. What is its rotatio
What is the abbreviated electron configuration for the +3 ion of Chromium? I know the lectron configuration for chromiumbut I'm lost with the ion. Any help will be appreciated
A charge of 0.050 C moves vertically in a field of 0.080 T that is oriented 45° from the vertical. What speed must the charge have such that the force acting on it is 10 N? Please show work.
What is the composition of the bubbles observed when the crudemethyl benzoate product is washed with sodium bicarbonate? Hint: consider the acidity of the solution (some HCl will still be present) a
When a current of I = 41 A exists in the wire, the wire swings upward and, at equilibrium, makes an angle φ with respect to the vertical, as the drawing shows. Find (a) the angle and (b) the ten
What concentrations of acetic acid and sodium acetate are required to prepare a buffer solution with pH = 4.60? Ka =1.8 x 10-5 for acetic acid.
Determine the parachutist's acceleration when the chute is just opened, assuming his mass is 60 kg.
Hydrogen peroxide was catalytically decomoposed and 75.3 mL of oxygen gas was collected over water at 25 degrees celsius and 742torr. What mass of oxygen was collected? (Pwater =24 torr at 25 d
If the net force acting on the particle is 6.22×10-3 in the positive direction, find the components of the particle's velocity. Assume the particle's velocity is in the x-y plane.
Mechanical Advantage If lifting the piano straight up would require 1700 N of force, what is the mechanical advantage of the ram
If Ka is 1.85E-5 for acetic acid, calculate the pH at one half the equivalence point and at the equivalence point for a titration of 50mL of 0.100M acetic acid with 0.100M NaOH.
The formation constant Kf for the complexion Zn(OH)42- is 2.8 1015. What is the concentration of zinc ion,Zn2+, in a solution that is initially 0.50 M inZn(OH)42-?
7- Magnesium sulfate, MgSO4, is added to 463 mL of 0.010 Msodium hydroxide, NaOH, until a precipitate just forms. How many grams of magnesium sulfate were added?