3. Uma lâmpada foi ligada diretamente a uma pilha. Mediu-se a diferença de potencial nos extremos da pilha tendo-se obtido o valor 4,0 V. A intensidade de corrente na lâmpada é 0,5 A. 3.1. Tendo em conta que 1 ampére (A), a unidade de intensidade de corrente, corresponde à passagem de 1 coulomb (C) de carga por segundo, qual é a carga que passa em cada secção da lâmpada em 2 segundos?

3.2. Sabendo que a diferença de potencial eléctrico (em volts) indica a energia (em joules) transformada por cada coulomb de carga que passa na lâmpada, qual é a energia que esta recebe em 2 segundos?

Jason and mia are both running in a race. as they approach the finish line, you being the physicist that you are decide to time how long it takes them to reach the end of the race. when you start your stop watch (you can take this as time t = 0 s) you notice that mia is an unknown distance d ahead of jason and both are moving with the same initial velocity v_0. you also notice that jason is accelerating at a constant rate of a_j, while mia is deaccelerating at a constant rate of -a_m. jason and mia meet each other for the first time at time t = t_1. at this time (t = t_1) jason's velocity is two times that of mia's velocity, meaning v_j (t_1) = 2v_m (t_1). a) draw the position vs. time graph describing mia's and jason's motion from time t = 0 to time t = t_1. clearly label your axes and initial conditions on your graph. b) draw the velocity vs. time graph describing mia and jason's motion from time t = 0s to time t = t_1. clearly label your axes and initial conditions on your graph. c) how long from when the stop watch was started at t = 0s did it take mia and jason to meet? express your answer in terms of know quantities v_0, a_m, and a_j. d) when the stop watch started at time t = 0s, how far apart, d, were mia and jason? express your answer in terms of know quantities v_0, a_m, and a_j.

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

Which of the following is the result of the nuclear weak force? the instability of large nuclei the repelling force between positively charged protons the structure of the atom certain types of nuclear decay