Sobre una superficie horizontal lisa setienen dos esferas que se mueven conrapideces de 4 m/s y 3 m/s, en la formacomo se indica. Determinar el tiempo quetranscurre desde el instante que se indicaen la figura, hasta el instante en que ladistancia que los separa sea mínima.

Can you use radiation to generate electricity

Does any one know what real love is and would anyone be willing to share it with me?

During physical science, ms. greene challenged her students to produce an energy transformation. james and jill wrapped a 4-inch nail with a coil of fifty turns of wire. they connected one end of the coil to one terminal of a knife switch. they connected the other terminal of the knife switch to the battery. finally, they connected the end of the coil to the other terminal of the battery. james held the tip of a 1-inch nail near the flat end of the 4-inch nail. jill closed the knife switch quickly and then opened it. the 1-inch nail was pulled toward the 4-inch nail. what is the best explanation of why the nail moved? a) electrical energy was converted to mechanical energy in the 1-inch nail. b) the 4-inch nail became an electromagnet and the magnetic force attracted the 1-inch nail. c) the electric current in the 4-inch nail was converted to mechanical energy in the 1-inch nail. d) the 4-inch nail had a positive charge and the 1-inch nail had a negative charge. opposites attracted.