Viscosity: Glycerin, with a viscosity of 1.5 N ? s/m2, is flowing with an average speed of 1.2 m/s through a tube that has a radius of 5.0 mm and is 25 cm long. What is the drop in pressure over the length of this pipe?
A. 140 kPa
B. 46 kPa
C. 72 kPa
D. 76 kPa
E. 130 kPa
Answer: A
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Standing Waves on a String: A 0.588-m string is tightly clamped at both ends. If the lowest standing wave frequency of the string is 326 Hz, how fast do waves travel on this string?
A. 383 m/s B. 475 m/s C. 582 m/s D. 724 m/s
Consider a situation where a constant force of 25 N acts on an object having a mass of 2 kg for 3 seconds.What is the magnitude of the change in the object's momentum?
a. 150 kg m/s b. 50 kg m/s c. 75 kg m/s d. undetermined—not enough information given e. none of the above
A frictionless simple pendulum on Earth has a period of 1.75 s. On Planet X its period is 2.14 s. What is the acceleration due to gravity on Planet X?
What will be an ideal response?
If the source moves, the wavelength of the sound in front of the direction of motion is ____________ the wavelength behind the direction of motion
a. the same as c. smaller than b. larger than d. unrelated to