What is the frequency of electromagnetic wave
(a) what is the wavelength of a 2.0 MHz ultrasound wave traveling through aluminum?
(b) What is the frequency of electromagnetic wave have the same wavelength as the ultrasound wave of part a?
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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?
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(a) what is the wavelength of a 2.0 MHz ultrasound wave traveling through aluminum? (b) What is the frequency of electromagnetic wave have the same wavelength as the ultrasound wave of part a?
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A technician monitoring a group of five computers in an automated manufacturing facility. it takes an average of 15 minutes, exponentially distributed, to adjust any computer that develops a problem. the computers run for an average of 85 minutes,
Q1. What must the charge (sign and magnitude) of a particle of mass 1.47 g be for it to remain stationary when placed in a downward-directed electric field of magnitude 700 N/C? Use 9.81 m/s^2 for the magnitude of the acceleration due to gravity.
A car is travelling alonna highway with a speed of 2.5 m/s when the driver notices an obstruction 1.80 x 10^2m directly ahead. It takes the driver 0.80 sec to react and being braking. a) How far does the car travel before it begins to slow down?
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If a child's achievement is below what would be expected given their level of intellectual functioning (as derived from an IQ test such as the WISC-IV)
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