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Ocean waves (on a particularly nice summer day) move past at 1.8 waves/s. find the speed of the waves
As it enters a pipe, a perfect fluid has spped 3.70 m/s. As it exits the pipe, the speed is 10.6 m/s. what is the radius of the pipe at the exit
A(n) 19_kg object floating in water has 0.24 of its volume above the surface of the water. What is the volume of the object
A block of metal has an actual weight of 45 N and an apparent weight of 25 N in water. What is the buoyant force from the water
An object has a volume of 3.29m^3 and a mass of 3000 kg. If the object were attached by a cable to the bottom of a swimming pool, what would be the tension in the cable
A cube with edge 3.0 cm floats with 2/3 of its volume below the surface of the water. What is the mass of the block
A 70 kg person stands on one foot. If his foot is approximately a(n) 8.0-cm by 30-cm rectangle, what is the average pressure beneath his foot
Determine the [H3O+], [OH-], pH, and pOH for each of the following solutions. A solution with a pH of 6.25
In a series R-L-C circuit, R= 300oms, Xc=300oms and XL=500 oms . The average power consumed in the resistor is 60.0 W. What is the power factor of the circuit
11.6 mL of 3.0 M sulfuric acid are required to neutralize the OH- in 25.00 mL of NaOH solution. What is the molarity of the NaOH solution
Two isotopes having the same mass number are known as isobars. Calculate the difference in binding energy per nucleon for the isobars 23/11 Na and 23/12 Mg
20.00 mL of 0.160 M HC2H3O2 (Ka = 1.8x10-5) is titrated with 0.200 M NaOH. What is the pH at the equivalence point
Three charges are positioned on a line. Q1= -2uC, Q2= +5uC, Q3= +3uC. The distance between Q1 and Q2 is a=0.25m. Find the direction of the electric force acting on the charge
20.00 mL of 0.160 M HC2H3O2 (Ka = 1.8x10-5) is titrated with 0.200 M NaOH. What is the pH of the solution before the titration begins
how many NB molecules could you make by screwing one nut onto each bolt? show a balanced chemical equation and show all calculations for full credit
If I have 100.00 mL of 0.350 M latic acid already, how many grams of sodium lactate (molar mass = 112.06 g/mol) will I neeed to add to this solution to make the preceding buffer? Assume the volume d
The compound MgSo4 is called Epsom Salts. How many grams will you need to prepare a bath containing 5.60 moles of Epsom salts
Write the correct equation for the principal B/L acid/base equilibrium reaction in 0.1 M (H4N)2So4.
small object is placed to the left of a convex lens and on the optical axis. What is the position of the image formed by the lens
Calculate the number of grams in each of the following: 0.520 mole NaCl 1.80 moles Na2C 0.250 mole H2O 4.10 moles CO2
Calculate the molar mass for each of the following. Express your answer to four significant figures and include the appropriate units. Cl2 C3H6O3 Mg3(PO4)2 AlF3 C2H4Cl2 SnCl2
An electron has an initial velocity of 5.00 106 m/s in a uniform 3.00 105 N/C strength electric field. What is the direction of the electric field
What is the maximum number of electrons that can be in a second electron shell (principal energy level)?
A 25.00 mL aliquot of iron solution was titrated to equivalence with 26.19 mL of 0.0215 M KMnO4. A procedure similar to the one in experiment 7 was followed. Calculate the moles of iron in the origi
An object fired at an angle of 35.0(degrees) above the horizontal takes 1.87s to travel the last 11.4m of its vertical distance, With what velocity was the object launched