Un metal sólido no flota sobre su correspondiente fundido poque es mas denso que el mismo.
Que una sustancia flote en otra depende de sus densidades. La densidad es el cociente entre la masa y el volumen de un objeto. Los objetos menos denso flotan en los mas densos.
En general, los sólidos son mas densos que los líquidos, y estos que los gases. Esto se debe a las fuerzas de atracción que hacen que la misma masa ocupe menos volumen en el caso de los sólidos. Este es el caso de los metales sólidos que no flotan en su correspondiente fundido.
El hielo flotando sobre el agua es una excepción a esta regla general. El puente de hidrógeno en el agua hace que este tenga mas volumen que el liquido y por lo tanto sea menos denso.
Un metal sólido no flota sobre su correspondiente fundido poque es mas denso que el mismo.
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a population can become more adapted to its environment through natural selection. natural selection is a process by which organisms that are well adapted to their environment survives and produce more offspring. The least adapted organism die and are unable to give rise to new generation with characteristics that are not well adapted to the environment. the process is also referred to as survival for the fittest. this is the main process that brings about evolution. the theory of natural selection was fully expounded by scientist Charles Darwin.
Answer:
The increased amounts of greenhouse gases human activities are adding to the atmosphere have upset the balance that has been in place since the end of the last ice age. Adding more greenhouse gases decreases the amount of infrared radiation energy leaving the atmosphere.
Explanation:
a genetic structure in a cell that can replicate independently of the chromosomes, typically a small circular DNA strand in the cytoplasm of a bacterium or protozoan. Plasmids are much used in the laboratory manipulation of genes.