*answer asap*
the length of a pendulum is 25 cm, and the mass of the bob is 300 g. it is displaced from the equilibrium position and released. at the lowest point of the trajectory the ke of the pendulum is 0.265 j.

a. how fast is the pendulum moving when at the lowest point?

b. from what height (above the lowest point of the trajectory) was it released?

c. what is the total mechanical energy of the pendulum?

d. the pendulum is passing through a point 5 cm above its equilibrium position (its lowest point).
- find its pe

- find its ke

Is the number of complete movements of a wave per second.

Atrain is traveling at 30.0 m/s relative to the ground in still air. the frequency of the note emitted by the train whistle is 262 hz. the speed of sound in air should be taken as 344 m/s. what frequency (f approach) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and approaching it? what frequency (f recede) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and receding from it?

Ais a multilevel way of grouping items based on common properties among them. a. memory b. conceptual hierarchy c. schema d. semantic network