Una barra de plomo tiene una longitud de 0.40 m y un área de sección transversal de 0.06 m2. La temperatura de uno de sus extremos es de 80°C y la del otro 20°C. Encuentra la rapidez de la transferencia de calor (Kplomo= 34.7 W/m K) 1 W=joule/segundo

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

Which safety measures should you follow during a thunderstorm? check all that apply. (a) avoid touching anything that conducts electricity. (b) avoid touching a person who has been struck by lightning. (c) go outside. (d) keep your computer turned off. (e) stay out of water. (f) stay inside.

Aperson walking 1 mile everyday for exercise, leaving her front porch at 9: 00 am and returning to her front porch at 9: 25 am. what is the total displacement of her daily walk? a) 1 mileb) 0c) 25 minutes d) none of the above