Acopper cube weighs 0.25n in air and 0.17n when completwly immersed in paraffin oil and 0.15n when completely immersed in water . what is the ratio of the upthrust in air to the upthrust in water

The necleus of an atom is made up of what subatomic particles?

**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

Question part points submissions used suppose that 2 j of work is needed to stretch a spring from its natural length of 26 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 28 cm to 32 cm? (round your answer to two decimal places.)