In a stringed musical instrument, the sound frequency of a particular string can be increased by
a. tightening the string.
b. loosening the string.
c. lengthening the string.
d. increasing the string's thickness.

How many chromosomes are in a gold fish?

Which factor that affects biodiversity?

1. you serve a volleyball with a mass of 2.1 kg. the ball leaves your hand with a speed of 30 m/s. the ball has energy. calculate it. 2. a baby carriage is sitting at the top of a hill that is 21 m high. the carriage with the baby weighs 12 n. the carriage has energy. calculate it. 3. a car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. the car has . calculate it.