1) Um pesquisador adotou uma escala termométrica Y em que, para a temperatura de fusão do gelo, ele estabeleceu o valor 40° Y e, para a temperatura de ebulição da água, ele estabeleceu 120°Y. A) Certo dia, entre as 9 horas da manhã e o meio-dia, a temperatura ambiente variou e chegou a 7,5oC. Qual é o valor dessa variação de temperatura na escala Y?

Wo small variable-thrust jets are actuated to keep the spacecraft angular velocity about the z-axis constant at ? 0 = 1.16 rad/s as the two telescoping booms are extended from r1 = 1.18 m to r2 = 4.69 m at a constant rate over a period of 124 seconds. the small 19-kg experiment modules at the ends of the booms may be treated as particles, and the mass of the rigid booms is negligible. determine the necessary thrust t for each jet as a function of time where t = 0 is the time when the telescoping action is begun. after you have the general expression for t, answer the questions. show work.