Question 1
string length and frequency have a(n) relationship.

direct

inverse (indirect)

The correct answer is direct.

Inverse

Explanation:

If l is the length of the string. The frequency of the vibrating string is given by :

..............(1)

Where

T is the tension in the string

is the mass per unit length

It is clear from equation (1) that the frequency of the vibrating string is inversely proportional to the length of the string. So, String length and frequency have an inverse relationship.

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

true tan speed = ang vel x radius