Increasing the mass attached to a spring will increase its vibrational period.
true or false?

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

Atomic nuclei of almost all elements consist of

**urgent** roberto plans to use two transformers to reduce a voltage of 120 v to 4 v. he uses a transformer that has 300 coils in the primary winding and 50 coils in the secondary winding. he has four other transformers, as listed in the table. which transformer should roberto use to have an ending voltage of 4 v? a- w b-xc- yd- z