Atomos neutros de um certo elemento representativo m apresentam dois elétrons em sua camada de valência. as fórmulas corretas para seu óxido normal e brometo são, respectivamente: (dados: o = 6a e br = 7a) a) m20 e mbr. b) mo2 e mbr2. c) mo e mbr2. d) m2o2 e m2br.

The temperature at a point (x, y) is t(x, y), measured in degrees celsius. a bug crawls so that its position after t seconds is given by x = 6 + t , y = 8 + 1 3 t, where x and y are measured in centimeters. the temperature function satisfies tx(3, 9) = 5 and ty(3, 9) = 4. how fast is the temperature rising on the bug's path after 3 seconds? (round your answer to two decimal places.)

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?

The force it would take to accelerate an 900-kg car at the rate of 6m/s2