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The angle between the beam and the cable is 90o. If the beam is inclined at an angle of q = 24.5o with respect to horizontal, what is the horizontal component of the force exerted by the hinge on th
A solid cylinder with a mass of x kg and a radius of x m starts from rest at a height of x m and rolls down a x degrees slope. what is the translational speed of the cylinder when it leaves the inc
Assuming all gases are at the same temperature and pressure, how many liters of carbon dioxide are produced from 15.0L of CO?
A father racing his son has three-fifths the kinetic energy of the son, who has three-fifths of the father. What is the original speed of the father?
A 25.0 ml sample of 0.200 M benzoic acid is mixed with a 100 m sample of 0.400M NH3. What is the PH of this solution.
An oscillator with a mass of 520 g and a period of 0.900 s has an amplitude that decreases by 2.50% during each complete oscillation. If the initial amplitude is 9.60 cm, what will be the amplitude
On a frictionless, horizontal air track, a glider oscillates at the end of an ideal spring of force constant 2.52 N/cm. The graph in the figure shows the acceleration of the glider as a function of
carbonate buffers are important in regulating PH of blood at 7.40. What is the concentration of CO2 in a 0.200M NaHCO3 at PH=7.40 ?
Kc=0.0420. The concentration of the products at equilibrium are [PCl3]=0.160 M, and [Cl2]=0.230 M. What is the concentration of the reactant PCl5 at equilibrium?
The displacement of a certain moving body is given by
An electron with an initial speed of 5.50×105 {rm{ m/s}} is brought to rest by an electric field. What was the potential difference that stopped the electron?
What is the emf of this cell when [Fe2+]= 1.5M , [Fe3+]= 1.8×10-2M , PO2= 0.47atm and the pH of the solution in the cathode compartment is 2.7?
A converging lens of focal length 7.92 cm is 24.1 cm to the left of a diverging lens of focal length -5.97 cm. A coin is placed 11.1 cm to the left of the converging lens. Calculate the location of
Three uniform thin rods, each of length L = 39 cm, form an inverted U. The vertical rods each have a mass of 15 g; the horizontal rod has a mass of 32 g. What are (a) the x coordinate and (b) the y
A Spring is compressed by 0.0800m and is used to launch an object horizontally with a speed of 2.40m/s. If the object were attached to the spring, at what angular frequency (in rad/s) would it osci
Not wishing to get his feet wet, a student walks around the pool and measures its circumference to be 15.0 m. Next, the student stands at the edge of the pool and uses a protractor to gauge the angl
An engine is being used to raise a 89-kg crate vertically upward. If the power output of the engine is 1620 W, how long does it take the engine to lift the crate a vertical distance of 18.7 m? Frict
Find the tension in the rope required to make him follow his circular path, assuming he starts from rest when the rope is horizontal?
The reported values for one compound (CxHyOz) were as follows: mass: 214.1360 g/mol; percent carbon and hydrogen: 84.07 and 8.47, respectively. What is the molecular formula of the compo
If U = 3.00 J when the particle is 2.00 m from the origin, find the numerical value of the y-component of the force on this particle when it is at the point (-1.00 m, 2.00 m, 3.00 m).
Two balloons that have the same weight and volume are filled with equal amounts of helium. One is rigid and the other is free to expand as the pressure outside decreases. When released, which will
Bonnie and Clyde are sliding 460 {rm kg} bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 395 {rm N} of force while Bonnie pul
A solution is made by adding 1.24 mol KCl to 1399.0 g of water. What is the percent by mass of KCl in this solution?
A 200-m-wide river flows due east at a uniform speed of 2.0 m/s. A boat with a speed of 8.0 m/s relative to the water leaves the south bank pointed in a direction 30 degrees west of north. What are
A 2.4 kg toy locomotive is pulling a 1.6 kg caboose. The frictional force of the track on the caboose is 0.54 N backward along the track. If the train is accelerating forward at 3 m/s2, what is the