1. A weather balloon is filled with 125.0 L of He and launched from sea level (T = 20.0°C, P = 755 torr).

The atmospheric pressure in the eye of a hurricane is found to be 26.6 inches of

mercury, which is equivalent to Earth. If the atmospheric pressure at 30.0 km is

28.0 torr and the temperature is -39.0 °C, what is the volume of the balloon

when it bursts?

What are the three stages of volcanic activity? a. active, magma, lava c. extinct, eruption, explosive b. eruption, quiet, explosive d. active, dormant, extinct

Nathan is an ecologist. he’s studying the effect of secondary consumers on primary consumers. his current research focuses on a population of blue jays and crows. they eat caterpillars and mice. if the number of blue jays increases, what are the likely effects on other populations? 1the number of crows will increase. 2the number of mice will decrease. 3the number of mice will remain the same. 4the number of caterpillars will decrease.

How are brightness and size related when it comes to stars