The energy in the water at the top of a waterfall is an example of __________ energy
Fill in the blank(s) with correct word
gravitational potential
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Young's Modulus: A piano wire has a radius of 0.50 mm. One end is fixed and the other is wrapped around a tuning peg, which has a diameter of 3.5 mm and is 80 cm away. After the wire just becomes taut, the peg is given three full turns. What is the tension in the wire? Young's modulus for steel is 2.0 × 1011 N/m2.
A. 3.8 kN B. 4.3 kN C. 6.5 kN D. 8.7 kN E. 9.8 kN
A basketball player lands on the ground after dunking the ball. Is the work done on the player by the contact interaction between the player and ground positive, negative, or zero?
A. Positive B. Negative C. Zero D. One needs more information to answer.
The oldest rocks on our crust are radioactively dated at about:
A) 200 million years old. B) one billion years old. C) 2.7 billion years old. D) four billion years old. E) 4.6 billion years old.
If a guitar string has a fundamental frequency of 512 Hz, what is the frequency of its first overtone?
a. 511 Hz b. 256 Hz c. 510 Hz d. 1 020 Hz e. 513 Hz