An "e" tuning fork with a frequency of 329 hz is used to test the "e" note of a piano. four beats are heard. this means

the piano key is in tune.
the piano key is out of tune and has a frequency of 333 hz.
the piano key is out of tune and has a frequency of 325 hz.
the piano key is out of tune and has a frequency of either 325 or 333 hz

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd a) 30 joules b) 3000 joules c) 320 joules d) 3200 joules