Un atizador de aluminio mide 1.2 m de largo y 0.9 cm de diámetro. Uno de sus extremos está en una fogata cuya temperatura es de 450 °C y el otro extremo está a 25 °C. Si se

desprecia la energía disipada por el atizador, ¿cuál es la cantidad de energía que se conduce

por segundo de un extremo a otro?

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

**urgent** roberto plans to use two transformers to reduce a voltage of 120 v to 4 v. he uses a transformer that has 300 coils in the primary winding and 50 coils in the secondary winding. he has four other transformers, as listed in the table. which transformer should roberto use to have an ending voltage of 4 v? a- w b-xc- yd- z

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90