O professor Hosney, levou os alunos da segunda série ao laboratório para realizar um experimento. Pegou um recipiente de capacidade 1000ml, a uma temperatura de 68oF e nele despejou 980 ml de uma substância, a 20oC. Enquanto colocou o conjunto para aquecer, consultou uma tabela onde encontrou o coeficiente de dilatação volumétrica da substância, 4 x 10-4 ºC-1 e o coeficiente de dilatação linear do material do recipiente, 3 x 10-5 ºC-1. Hosney pediu então que os alunos determinassem a temperatura a partir da qual, a substância iria transbordar. Um aluno perguntou então, qual a temperatura de fusão da substância, e o professor respondeu prontamente 290,8 K. Qual a temperatura a partir da qual a substância transbordará ?
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Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?
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O professor Hosney, levou os alunos da segunda série ao laboratório para realizar um experimento. Pe...
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