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A cylindrical space station of radius R and length L has a density that varies with distance from its center, Calculate the total mass M of the entire space station
Two very small spheres, each with a mass m = 1.5 g, are suspended from a common axis by insulating threads of length L= 6.0 cm, What is the magnitude of the unknown charge q
Inside a cart that is accelerating horizontally at acceleration ~a, there is a block of mass M connected to two light springs of force constants k1 and k2
A 40g block of ice is cooled to -78 deg celcius and is then added to 560g of water in an 80g copper calorimeter at a temperature of 25 degrees celcius, determine how much ice is left
A 0.950kg block is attached to a spring with spring constant 16N/m, What is the amplitude of the subsequent oscillations and What is the block's speed at the point where x= 0.20
Vector A points in the negative x direction. Vector B points at an angle of 60 above the positive x axis, Given A+B+C=0, find the magnitude of A and B
Will a precipitate of Mg(OH)2 form when 25 mL of 0.010 M NaOH is combined with 75 mL of a 0.10M Solution of magnesium chloride
Calculate the molar solubility of silver thiocyanate, AgSCN, in pure water and in water containing 0.010 M NaSCN.
Estimate the solubility of silver iodide in pure water at 25 degrees Celsius (a) in moles per liter and (b) in grams per liter.
A birds travels at 1.4 m/s with a fish in its claws, at 15 degrees below the horizontal. If it drops the fish that takes 1.8 seconds to land on the ground
A 20.0 mL sample of 0.150M KOH is titrated with 0.125M HClO4 solution. Calculate the pH after the following volumes of acid have been added.
A stunt man drives a car at a speed of 20 m/s off a 35-m-high cliff. The road leading to the cliff is inclined upward at an angle of 20?, What is the car's impact speed
A system consists of two positive point charges, q1 and q2>q1. The total charge of the system is +62.0 x 10^-6 C, Find q1 and q2
The decay of radioactive elements follows first-order kinetics. Therefore, the rate of decay can be described by the same integrated rate equations and half-life equations that are used to describe
Ammonia can be made by reacting calcium cyanamide (CaCN2) with water as shown: CaCN2 + 3 H2O => CaCO3 + 2 NH3.
All living things contain carbon. Most of this carbon is stable carbon-12. However, a small percentage will be carbon-14, a radioactive isotope of carbon that decays with time. As living things eat
A strip of doped silicon 325 µm wide contains 9.6 1022 conduction electrons per cubic meter and an insignificant number of holes, What is the thickness of the strip
Consider the following reaction: 2 B5H9 + 12 O2 => 5 B2O3 + 9 H2O How many molecules of B2O3 are made by the reaction of 164.9 g of B5H9
If a 55 laboratory mouse is exposed to 21.5 rad of radiation, how much energy was absorbed by the mouse's body
A thin glass rod forms a semicircle of radius r = 3.03 cm. Charge is uniformly distributed along the rod, with +q = 1.05 pC in the upper half and -q = -1.05 pC in the lower half
A 220 kiln is used for vitrifying ceramics. It is currently operating at 955, and the pressure is 0.9750 . How many moles of air molecules are within the confines of the kiln
Two satellites are in circular orbits around a planet that has radius 9.00*10^6 m. One satellite has a mass 68.0 kg, What is the orbital speed of the second satellite
What is the pH of a buffer solution prepared from 5.15g of NH4NO3 and 0.10L of 0.15M NH3? What is the new pH if the solution is diluted with pure water to a volume of 500mL
In compressing the spring in a toy dart gun, 0.6 J of work is done. When the gun is fired, the spring gives its potential energy to a dart with a mass of 0.08 kg, What is the dart's speed