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The A string of a violin is 32 cm long between fixed points with a fundamental frequency of 440 Hz and a mass per unit length of 6.5×10-4 kg/m. What are the wave speed in the string?
What is the pH of a solution which is 0.023 M in weak base and 0.035 M in the conjugate weak acid (Ka = 7.1 × 10-6)?
Because of the cramped space under the hood, you'll need to pull at an angle of 115^circ with respect to the wrench shaft. With what force must you pull?
A 65 kg swimmer jumps off a 10 m tower. The swimmer comes to a strop 2.0 m below the surface. What is the net force exerted by the water
What kind of kinetics does this enzyme follow: rapid equilibrium or just the general steady state? Justify your answer.
Assuming that all of the fuel is used, find the final speed of the last portion of the ejected fuel relative to a stationary observer. Please provide step-by-step method.
What are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor?
A force of 5.3 N is needed to hold on to an umbrella in a strong wind. If the air molecules each have a mass of 4.7 × 10-26 kg, and each strikes the umbrella (without rebounding) with a speed
A 65.5 kg circus performer slides 4.15 m down a pole to the circus floor, starting from rest. (b) What is her kinetic energy when the frictional force has a magnitude of 520 N?
The vapor pressure of water is 28.3 torr at 29°C if a reaction at that temperature produces CO2 which is collected over water at a total pressure of 576 torr, what is the partial pressure of oxy
The disk has a mass of 200 kg and a radius of 2.0 m. A 42- kg child rides at the center of the merry-go-round while a playmate sets it turning at 0.10rpm. How fast will the disk be turning (in rpm)?
A hypothetical molecule, X-Y, has a dipole moment of 1.64 D and a bond length of 165 pm. Calculate the percent ionic character of this molecule.
A stone S of mass 8 kg is attached to the other end of the rope. S is held at a point 6m vertically below A and then released. Find the initial acceleration of S.
A 18.6 kg piece of zinc at 75 degrees Celsius is placed in a container of water. The water has a mass of 20 kg and has a temperature of 10.1 degrees Celsius before the zinc is added. What is the fi
A sample of gas weighs 0.250 g and occupies a volume of 112 cm3 at STP. what is the molecular weight of this gas ?
A toy car X of mass .200 kg moves along a frictionless surface with a velocity of .180 m/s. It collides with another toy car Y, with a mass .250 kg and a speed of .130 in the same direction. After
A disk, initially rotating at 149 rad/s, is slowed down with a constant angular acceleration of magnitude 4.23 rad/s2. (a) How much time does the disk take to stop? (b) Through what angle (rad) does
A multiple stage evaporator concentrates a weak solution of lithium hydroxide from 4.48 wt% to 26.78wt%. This evaporator processes 10 metric tonnes of solution each day. Determine:
A 63 kg student traveling in a car with a constant velocity has a kinetic energy of 1.15e4 J. What is the speedometer reading of the car in km/h?
A force acting on a body in empty space increases at a constant rate from zero. The body has a mass of 10 kg, and after 4 seconds the force is 50 N. What is the speed of the object at 4 seconds?
If the backpack begins to slide when the spring ( = 130 ) stretches by 2.40 , what is the coefficient of static friction between the backpack and the table?
Consider the base monosodium phosphate, Na (HO)2P( O)O . (a) Write the structure of the conjugate acid of this base. (b) Given that the pKa of this conjugate acid is 2.1, explain why an aqueous solu
Point charges of +1.00 X 10-9C, +1.00 X 10-9 C, and -2.00 X 10-9, are placed at the vertices of an equilateral triangle. Find the magnitude of the electric field at the center of the triangle, whic
With the suspension point fixed.The mass is pulled away a distance 20cm beyond the equilibrium position 0 and released. Find The differential equation and initial conditions describing the motion.
A spring with a spring constant of 32.0 N/cm has a block attached to one end and the other end is fixed. How much work does the spring do on the block if the spring is stretched from relaxed length