Uma fonte de 36 v alimenta um circuito composto por resistores conforme o esquema apresentado. se r = 10ω , qual a resistência equivalente e a corrente que passa pela fonte? a) 10ω e zero b) 10ω e 3,6 a c) 12ω e 3,6 a d) 12ω e 3,0 a e) 60ω e 0,6 a

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)

Which of these has some mechanical energy? a. an atom b. heat inside earth c. a book on a shelf d. the fire from a lit match

What is an electric motor? explain its operation. 2-3 sentence