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If the cat weighs 6.67 kg and is suspended 1.73 m below the ceiling, how many electrons have to be extracted from the cat? Assume that the cat and the metal plate are point charges.
At the end of the firing period, the craft has velocity components of vx = 3762 m/s and vy = 4847 m/s. Calculate the magnitude of the initial velocity.
When reducing a ketone to an alcohol in a lab, why do we have toadd sodium borohydride little by little under ice water? Also, whenoxidizing an alcohol to ketone, why do we add glacial acetic acid b
A severe thunderstorm dumped 2.5 in of rain in 30 min on a town of area 34 km^2. What mass of water (in kg) fell on the town? One cubic meter of water has a mass of 10^3 kg.
An infinitely sharp zone of solute is placed at the center of acolumn at time t=0. After diffusion for time t1, the standarddeviation of the Gaussian band is 1.0mm. After 20 minutesmore, at time t2,
Write a Structural formula for a molecule containing three carbonatoms that represent ans alcohol, an organic acid, and anester.
This solution has an osmotic pressure of 2.50 atm at 25 degrees Celsius. If each molecule of the solute dissociates into two particles (in this solvent), what is the molar mass of this solute?
An axon is the relatively long tail-like part of a neuron, or nerve cell. The outer surface of the axon membrane (dielectric constant = 5, thickness =1.00 x 10-8 m) is charged positively, and the i
The nutritional calorie (Calorie) is equivalent to 1 kcal. Onepound of body fat is equivalent to about 4.1 multiplied by 103Calories. If an athlete expends 1720.kJ/h, how long does she have to play
Two 5 gram spheres are each suspended from a pin by a 40 cm long non-conducting thread. If the spheres are separated by 7 cm because of electrostatic repulsion, find the charge on each, knowing the
The balanced equation for the reaction of magnesium metal withaqueous hydrochloric acid is Mg(s) + 2HCl(aq) -> H2(g) +MgCl2(aq). If 0.037 gram of magnesium are reacted with excess HCl,how many mo
A magician's trick involves charging a 50 kg box with 2 x 10-3 C of charge, then charging a platform with the same charge. When the box is released, it "floats" how far above the platform?
Calculate the freezing point and the boiling point of a solution prepared by dissolving 5.0 g of KClin 550 g of water. kf and kb for water are1.86 ºC/m and 0.51 ºC/m, respectively..
A transparent oil of index of refraction 1.29 spills on the surface of water (index of refraction 1.33), producing a maximum of reflection with normally incident orange light (wavelength 600nm in ai
Of the initial charges on the spheres, with a positive net charge, what was (a) the negative charge in coulombs on one of them and (b) the positive charge in coulombs on the other?
You are given 84.27241 g of a substance initially at 293.89622K. It is heated first to its freezing point, 357.72232 K, andthen to its boiling point, 496.31828 K. The heat capacity of the solid form
The center of mass of the ladder is 2.5 m from its base, and the coefficient of static friction between the ladder and the floor is 0.2. How far up the ladder, measured along the ladder, can a 600N
When a salt like magnesiumnitrate is dissolved in water it dissociates. if six moles of magnesium nitrate are dissolvd how many moles of nitrate ions would be in the solution?
A) If a toaster is plugged into a source of alternating voltage with an rms value of 163 V, an rms current of 8.29 A occurs in the heating. What is the resistance of the toaster's heating element?
When chlorine gas is bubbled into a solution of a sodium bromide, the sodium bromide reacts to give bromine, a red- brown liquid, and sodium chloride (table salt). A solution was made by dissolving
If you slowly pull the string down through the hole, what quantity is conserved during this motion? What is the block's speed when it is a distance r from the hole?
What are the relative activating properties of amino and acetamido groups in electrophilic aromatic substitution reactions? Mainly in bromation of aromatics.
A sample volume of 0.5mL was pipetted into a beaker, treated withreagents to produce an indigo color, transferred to a volumetricflask and diluted to 25 mL.The concentration of Fe was found to be2.
The system is released from rest. If there is no sipping between any of the surfaces, what is the acceleration of the board. Solve using force and torque.
A child and sled with a combined mass of 48.6 kg slide down a frictionless hill that is 8.94 m high. If the sled starts from rest, what is its speed at the bottom of the hill?