What is the power of a kitchen if it can preform 2000 joules of work in 5 seconds 10,000 watts 400 watts 2500 watts it cannot be determined from this info

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

Your friend increases her force on the desk by 30n . she doesn't change the direction of her push . what happens to the net force on the desk .will the desk accelerate

Aflute player hears four beats per second when she compares her note to a 523 hz tuning fork (the note c). she can match the frequency of the tuning fork by pulling out the “tuning join” to lengthen her flute slightly. what was her initial frequency?