A malha quadriculada a seguir representa as ruas de um bairro. As casas em que Aline e Bruna moram estão representadas, respectivamente, pelos pontos A e B. Elas resolveram se encontrar na praça identificada pelo ponto P para depois irem juntas ao cinema no ponto C. O segmento AP representa o caminho percorrido por Aline e o segmento BP, por Bruna, das respectivas casas até a praça. Considere que studos representa o caminho percorrido por elas da praça ao cinema e que AP = 1 000 m. De acordo com essas informações, podemos afirmar que:

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Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?