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A 0.5M aqueous solution of hypobromous acid (for which Ka=2.3 * 10*-9) has what pH ? a. 6.78 b. 5.36 c. 4.47 d. 3.39 Please show the counting process.
What mass of sodium chloride would need to be added to the blood to bring the sodium ion concentration up to 0.140 M , assuming no change in blood volume
The equation of a transverse wave traveling along a very long string is y = 5.0 sin (0.055 ?x + 6.0 ?t), Determine the amplitude of propagation of the wave
A small ball of mass, m = 8.60 × 10-9 g, has acquired an excess charge. The ball is then placed between two parallel plates spaced x = 3.45 mm, How many electrons did the ball gain or lose
Over a time interval of 1.92 years, the velocity of a planet orbiting a distant star reverses direction, changing from +19.7 km/s to -19.1 km/s. determine the total change in the planet's velocity
The ultrasonic transducer used in medical ultrasoundimaging, is a very thin disk ( m =0.10g) driven back, What is the disk's maximum speed at this amplitude
The Space Shuttle travels at a speed of about 7.60 103 m/s. How many football fields (length = 91.4 m) does the Shuttle cover in the blink of an eye
A highway is to be built between two towns, one of which lies 30.0 km south and 83.0 km west of the other. at what angle would this highway be directed
A spring has an unstretched length of 12cm. When an 80 g ball is hung from it, the length increases by 4.0 cm. What is the period of the oscillation
a falling flower pot passes a 1.5 m tall window of an apartment building in a time of .16 s. from what height above the top of the window was the pot dropped
A dart is thrown horizontally toward the bull's-eye, point P on the (non-standard size) dart board, How far away from the dart board did the dart thrower stand
a ball is thrown upward from the roof of a building, passes the roof going down three seconds later, how fast did the ball strike the ground
if a drage car had a constant acceleration throughout a quarter mile (402 m) race, what would be the top speed reached
The diameter of the cylinder is 0.5m. and the piston height is 1m. a.what is the mass of the weights on the cylinder? b.You heat the gas to 1000k. how high will the cylinder rise? c.How much work wi
A small glass bead charged to 5.9nC is 4.0cm from a thin, uniformly charged, 10cm long glass rod. What is the total charge on the rod
An electric dipole includes a charge of 4 ?C and a second charge. What is the total charge of the dipole
A football is kicked at an angle of 28.4 degrees above horizontal and with an initial speed of 27.9. The ball lands on a level field. Determine The range of the football
A hill that has a 25.7% grade is one that rises 25.7 m, At what angle is such a hill inclined above the horizontal
Jill jumps off the diving board with a velocity of 1.7 m/s at 38 degrees above horizontal. if the water surface is 2 meters below the board: with what velocity will she hit the water
A car races at a constant speed of 25 m/s around a circular track with a radius of 150 meters. find the displacement between the starting and ending points
A stone is thrown horizontally from the roof of a tall building with a speed of 23.3 m/s. how far from the building will the stone land
The initial temperature is 298k. The diameter of the cylinder is 0.5m. and the piston height is 1m. a. what is the mass of the weights on the cylinder
A ball is thrown upward from the ground with an initial speed of 15.2 m/s; at the same instant, After how long will the balls be at the same height
A prescription for a corrective lens calls for +1.50D. The lensmaker grinds the lens from a "blank" with n = 1.56, What should be the radius of curvature of the other surface
Two balls with a net charge of - 4.0 ?C and + 10.0 ?C are separated by 2 cm. What is the electrostatic force on the positive charge