Which of the following is used in sonata ii's prepared piano?
a. wooden blocks
b. coins
c. copper wire
d. small pieces of rubber

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

Two point charges are on the y axis. a 3.90-µc charge is located at y = 1.25 cm, and a -2.4-µc charge is located at y = −1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v

A2.00-m long piano wire with a mass per unit length of 12.0 g/m is under a tension of 8.00 kn. what is the frequency of the fundamental mode of vibration of this wire?