EXERCÍCIOS PROPOSTOS 1. Em um noticiário estadunidense de teve a cabo,
um jornalista disse que na cidade de Little
Rock,
durante uma nevasca, a temperatura chegou a
23 graus. Um estudante brasileiro, ao ouvir isso
ever as imagens de pessoas com blusas grossas,
zorros e cachecóis, ficou confuso, uma vez que
quando faz 23 sraus aqui no Brasil a sensação
termica e bastante agradável. Qual o motivo do seu estranhamento?​

The image below shows numerous volcanic mountains in the pacific northwest. what is the most likely cause of the volcanic and earthquake activity in this region?

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)