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a 50-N crate is pulled up a 5-m inclined plane by a worker at a constant velocity. what is the force applied by the worker
Determine the pH at the equivalence (stoichiometric) point in the titration of 31.4 mL of 0.899 M HF by 0.886 M NaOH. The Ka of HF is 3.5 x 10^-4.
A wire carries a current of 0.58 A. This wire makes an angle of 63° with respect to a magnetic field of magnitude 6.4 × 10-5 T. What is the length of the wire
What is the pH of a buffer prepared by adding 0.506 mol of the weak acid HA to 0.507 mol of NaA in 2.00L of solution? The dissociation constant Ka of Ha is 5.66 x 10^-7.
Two 2.50-cm-diameter disks spaced 2.00mmapart form a parallel-plate capacitor. The electric field between the disks is 4.60×105V/m. What is the voltage across the capacitor
A thin wire is bent into a semicircle, having a radius of curvature equal to 6.40 cm. What is the potential at the center of curvature?
Calculate the ph of the solution made by adding 0.50mol of HOBr and 0.30 mol of KOBr to 1.00 L of water. The value of Ka for HOBr is 2.0 x 10^-9.
Please complete and balance the molecular equation and write a net ionic equation, make sure to include the physical states of the compounds, if there is not reaction write NR for the products.
Suppose the moon were held in its orbit not by gravity but by a massless cable attached to the center of the earth. What would be the tension in the cable
A buffer is prepared by mixing 328 mL of 0.348 M HCl with 813 mL of 0.803 M ammonia (NH3). Given that the Kb of NH3 is 1.8 x 10-5, calculate the pH of the solution.
Calculate the pH when 8.14 g of NaClO is added to 445.5 mL of 0.50 M HClO. Ignore any changes in volume.
What are all the sterioisomers of CHDCl-CH2-CHDBr What are all the sterioisomers of BrCHDCHDBr
Calculate the hydroxide ion concentration in a solution that is 0.068 M morphine C17H19O3N and 0.045 M morphine hydrochloride C17H20O3NCl. Kb of C17H19O3N is 1.6 x 10^-6
If a system has 3.50 × 102 kcal of work done to it, and releases 5.00 × 102 kJ of heat into its surroundings, what is the change in internal energy of the system
Shooter shoots a bullet horizontally and has muzzle velocity of 460m/s and goes 45.7m. How can you do this with the range equation
After falling from rest from a height of 29 m, a 0.49-kg ball rebounds upward, reaching a height of 19 m. find average force was exerted on the ball
Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 9.70 MJ of energy (in the form of heat) if the temperature of the sodium is not
A 61 kg bungee jumper jumps from a bridge. She is tied to a bungee cord whose unstretched length is 11m , and falls a total of 32 m. Calculate the maximum acceleration she experiences
barium acetate + iron (II) sulfate a) molecular equation; b) net ionic equation: 3. magnesium hydroxide + chloric acid a) molecular equation: b) net ionic equation:
A highway curve has a radius of .58 km and is unbanked. A car weighing 36 kN goes around the curve at a speed of 36 m/s without slipping
A cat rides a merry-go-round while turning with uniform circular motion. At time t1 = 2.00 s, the cat's velocity is v1 = (5.50) i + (4.00 m/s) j, What is the magnitude of the cat's centripetal acce
Estimate the time it will take to flush 99% of the discharge from the lake. Immediately after the spill, the lake, completely mixed, has a pH of 8 and the total molar concentration of nitrogen speci
A 125-kg (including all the contents) rocket has an engine that produces a constant vertical force (the thrust) of 1720 N. Inside this rocket, Find the acceleration of the rocket
If you have 410.0 mL of water at 25.00 °C and add 140.0 mL of water at 95.00 °C, what is the final temperature of the mixture. Use 1.00 g/mL as the density of water.
A proton moving with a speed of 4.00 · 105 m/s in the positive y-direction enters a uniform magnetic field of 0.400 T pointing in the positive x-direction