Um ebulidor de resistência elétrica igual a 75,0W está envolto por 0,20 kg de gelo a 0 ºC. Os terminais do ebulidor são conectados a um gerador que fornece uma corrente elétrica de intensidade igual a 2 A, durante 1,4 minutos. Considere que toda energia dissipada pelo ebulidor foi integralmente absorvida pelo gelo. Considere, ainda, cágua= 4 J/g ºC e Lf(água) =320 J/g. Sobre esse evento físico, pergunta-se: a) Qual a energia elétrica total fornecida pelo gerador? b) Qual a temperatura final da água?

The human body stores chemical energy from digested food. some of the chemical energy is converted into mechanical energy when the body moves. which statement best supported by this information

How are series and parallel circuits simililar? both have multiple paths for electrons to travel. both require resistors in their circuits. both require a switch to complete the circuit. both have at least one path for electrons to travel.

An alpha particle with kinetic energy 12.5 mev makes a collision with lead nucleus, but it is not "aimed" at the center of the lead nucleus, and has an initial nonzero angular momentum (with respect to the stationary lead nucleus) of magnitude l = p0 b, where p0 is the magnitude of the initial momentum of the alpha particle and b=1.40×10−12 m. (assume that the lead nucleus remains stationary and that it may be treated as a point charge. the atomic number of lead is 82. the alpha particle is a helium nucleus, with atomic number 2.) what is the distance of closest approach?