Calcular la presión que ejerce un elefante sobre el suelo se si su masa es de 3000 kg y la huella de cada una de sus patas es aproximadamente de 500 cm². Compara el resultado con la presión aue ejerce una bailarina de 55 kg que aguante sobre la punta de uno de sus pies sobre una superficie de 11 cm². Sería muy bueno si pudieran explicarme :/​

What component of earth’s atmosphere exists entirely as a result of photosynthesis?

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )

Ideal meters problem. what internal resistance is ideal for a voltmeter? what internal resistance is ideal for an ammeter?