A copper wire is stretched with a stress of 60 MPa at 20˚C. If the length is held constant, to what temperature must the wire be heated to reduce the stress to 5 MPa? The value of αl for copper is 17.0 × 10-6 (°C)-1, the modulus of elasticity is equal to 110 GPa.

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.

Aroller coaster is traveling at 13 mi./s when you purchase a hill that is 400 m long and down the hill exonerate at 4.0 m/s squared what is the final velocity of the posterior found your answer to the nearest number

The plant food contains nh4)3po4 what tests would you run to verify the presence of the nh4 ion and the po4 ion