1. Indica si las siguientes oraciones son verdaderas o falsas:
a) La energía no se conserva, solo se crea o se destruye.
b) Si existe rozamiento, parte de la energía se disipa en forma de calor.
c) Una de las medidas que podemos tomar para disminuir los impactos ambientales es la reducción del consumo de energía.
d) Una onda es una perturbación que se propaga transportando materia.
e) Los terremotos y tsunamis están causados por energías externas
f) La energía potencial es la suma de la energía mecánica y la energía cinética
Answers: 2
Chemistry, 21.06.2019 18:00
Sylvanite is a mineral that contains 28.0% gold by mass. how much sylvanite would you need to dig up to obtain 77.0 g of gold? explain how you got your answer and the steps you took. you
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Chemistry, 21.06.2019 20:30
In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask
Answers: 2
Chemistry, 22.06.2019 05:30
Modern weaponry has increased the number of deaths in wars and violent conflicts.
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Chemistry, 22.06.2019 06:00
This flow chart shows the amount of energy that is emitted by each type of light. ultraviolet > blue light > yellow light > red light (maximum energy) (minimum energy) in an experiment, shining which type of light on a strip of metal would be least likely to produce the photoelectric effect? ultraviolet light dim blue light bright red light bright yellow light
Answers: 2
1. Indica si las siguientes oraciones son verdaderas o falsas:
a) La energía no se conserva...
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