The acceleration g due to gravity is estimated by dropping an object and measuring the time it takes to travel a certain distance. Assume the distance s is known to be exactly 2.2 m. The time is measured to be t=0.67 ± 0.02 s. Estimate g, and find the relative uncertainty in the estimate.
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While discussing a vibration: Technician A says if the vibration changes with a change in engine speed, the cause of the problem is most probably the torque converter. Technician B says if the vibration changes with vehicle speed, the cause of the problem is probably the driveshaft. Who is correct?
A. A only B. B only D. Neither A nor B
Si la pluma de la grúa con carga se inclina o se desvía, el radio medido _______.
a. se reducirá drásticamente b. subirá la carga c. aumentará hacia delante d. se tornará incalculable
High efficiency condensers ____.
A. can withstand higher pressures than standard condensers B. have more surface area than standard condensers C. have stainless steel coils D. are located in separate cabinets
In a typical concrete mix, 10 to 15 percent of the volume is _____
a. water b. aggregate c. admixtures d. portland cement