A guitar string 0.65 m long has a tension of 61 N and a mass per unit length of 3.0 g/m
(a) What is the speed of waves on the string when it is plucked? (b) What is the string's fundamental frequency of vibration when plucked? (c) At what other frequencies will this string vibrate?
(a) 143 m/s (b) 110 Hz (c) f = m(110 Hz), m = 2, 3, 4,
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A new roller coaster contains a loop-the-loop in which the car and rider are completely upside down
If the radius of the loop is 13.2 m, with what minimum speed must the car traverse the loop so that the rider does not fall out while upside down at the top? Assume the rider is not strapped to the car. A) 11.4 m/s B) 12.5 m/s C) 10.1 m/s D) 14.9 m/s
A car moving at 10.0 m/s encounters a depression in the road that has a circular cross-section with a radius of 30.0 m. What is the normal force exerted by the seat of the car on a 60.0-kg passenger when the car is at the bottom of the depression?
A) 200 N B) 389 N C) 789 N D) 489 N E) 589 N
Which of the following are dwarf planets?
A. Uranus and Neptune B. Eris and Uranus C. Pluto and Eris D. Neptune and Pluto E. Mercury and Eris
What occurs on the surface of the Sun during a solar cycle minimum?
a. decreased temperature of the photosphere b. reversal in rotation of the Sun c. little to no solar wind d. little to no sunspot activity e. partial dissipation of the corona