Wave travels along a string at a certain speed
A wave travels along a string at a speed of 280 m/s. What will be the speed if the string is replaced by one made of the same material and under the same tension but having twice the radius?
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A 1kg fluid is compressed reversibly according to a law PV=0.25, where p is in bar and v is in m^3/kg. The final volume is 1/4 of the initial volume. Calculate the work done on the fluid.
A 200-mL volume of NaOH solution was addedto 400mL of a 2.00 M HNO2 solution. The pH of themixed solution was 1.5 units greater than that of the original acidsolution. Calculate the molarity of the NaOH solution.
A bartender slides a beer mug at 1.50m/s towards a customer at the end of a frictionless bar that is 1.20m tall. The customer makes a grab for the mug and misses and the mug sails off to the end of the bar. (a) how far away from the end of the bar
What is the concentration of Ba(OH)2 in aBa(OH)2 solution if the pH is 8.25? What is the concentration of ammonium ion that must be in a0.15 M NH3 solution to produce a buffer of pH =8.0?
Magnesium sulfate, MgSO4, is added to 469 mL of 0.040 Msodium hydroxide, NaOH, until a precipitate just forms. How many grams of magnesium sulfate were added?
An astronaut must journey to a distant planet which is 210 light years from Earth. What speed will be necessary if the astronaut wishes to age only 13 years during the round trip? Assume that the trip is made at constant speed and give your answer
The estimate of the population proportions is to be within plus or minus .10, with a 95 percent level of confidence. The best estimate of the population proportion is .15. How large a sample is required?
If the rolling frictional force is determined to be 47,500 N and the power required to sustain the current velocity is 4.681 ,MW, determine the approximate drag coefficient of the train.
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