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.A sample of an ionic compound that is often used as a dough conditioner is analyzed and found to contain 7.591 g of potassium, 15.514 g of bromine, and 9.319 g of oxygen. What is the empirical form
Assuming that the cord does not slip on the pulley, find the magnitude of the acceleration of the two masses. And find the tensions T1 and T2.
A throat lozenge contains 5.0 mg of menthol, which has the formula C10H20O. How many moles of menthol are in 5.0 mg of menthol?
(a) What was the magnitude of the centripetal acceleration of the rock when it was on the string? (b) What was its speed when it was on the string?
If the electron beam travels in a perfectly straight line, hitting the screen directly in the center, calculate , the ratio of the charge on an electron to its mass
A student back-titrated the excess HCl with 41.53 milliliters of 0.365 M NaOH solution to a blue endpoint with bromophenol blue. How many moles of NaOH were added during the back titration?
Two soccer players start from rest, 48 meters apart. They run directly towards each other and both players are accelerating. The first player has an acceleration whose magnitude is 0.5 m/s^2 and the
A long solenoid of length 8m with a cross-sectional area of 5.0x10 -5 m2 contains a total of 52,000 turns. Calculate the self-inductance of the solenoid, assuming that the core of the solenoid is air.
A 121 cm-long, 4 g string oscillates in its m = 3 mode with a frequency of 214 Hz and a maximum amplitude of 5.0 mm. What are the wavelength and the tension in the string?
A 34.0-kg shell is fired from a gun with a muzzle velocity 100.0 m/s at 56.0o above the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment, w
If the anode compartment contains [SO2-4]= 1.50M in equilibrium with PbSO4(s), what is the Ksp of PbSO4?
A 3.0 m long rigid beam with a mass of 105 kg is supported at each end. An 70 kg student stands 2.0 m from support 1. How much upward force does each support exert on the beam?
A disk of mass 54 kg is held by a spring of unstretched length 63 cm and stiffness constant 300 N/cm, and rests on a frictionless table.
A 60.0 resistor is connected in parallel with a 116.0 resistor. This parallel group is connected in series with a 20.0 resistor. The total combination is connected across a 15.0 V battery. Find the
A disk initially rotating at 120 rad/s is slowed down with a constant angular acceleration of magnetude 4 rad/s^2 a) how much does the disk take to stop? b) through what angle doe the disk rotate d
A hockey puck moving at 0.474 m/s collides elastically with another puck that was at rest. The pucks have equal mass. The first puck is deflected 35.8° to the right and moves off at 0.331 m/s.
An oscillator of 5 kg is attached to a spring with constant 2000 N/m and compressed a distance of 0.6m. What is the value of b that will cause the oscillator to be critically damped? What is the ti
An electric field with a magnitude of 152 N/C exists at a spot that is 0.18 m away from a charge. At a place that is 0.51 m away from this charge, what is the electric field strength?
Calculate the concentration of NH3(aq) necessary to initiate the precipitation of Zn(OH)2 from a 0.0010 M ZnSO4 solution. The Ksp for Zn(OH)2 is 1.8 x 10-14. The Kb for NH3 is 1.8 x 10-5.
A uniform electric field of magnitude 350 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 3.60 cm. What is the work done by the field
Calculate the maximum height x above the floor at which the person can push the lamp so that it slides rather than tips.
The skier's mass is 59.0 kg, and the coefficient of kinetic friction between the skis and the snow is 0.100. Find the magnitude of the force that the tow bar exerts on the skier.
25.0 mL of a hydrofluoric acid solution of unknown concentration is titrated with 0.200 M NaOH. After 20.0 mL of the base solution has been added, the pH in the titration flask is 3.00. What was the
A charge of +3.2 10-5 C is located at a place where there is an electric field that points due east and has a magnitude of 17500 N/C. What are the magnitude and direction of the force acting on the
What is the magnitude and direction of the current in the smaller loop if the total magnetic field at the center of the system is zero?