If a sample of air contains 1 g/kg of water vapor and has a relative humidity of 25 percent at -5 degrees celsius how much water vapor does it need to contain to be saturated? a) 2 g/kg b) 1 g/kg c) 4 g/kg d) 3 g/kg

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.

There are two tomato plantlets one of them is kept in an oxygen chamber with a light source and another is kept in sunlight. both of them are watered regularly what will be the observation after two weeks

The amount of time it takes for one-half of the original amount of an isotope to decay is known as its question 9 options: correlation half-life period radioactivity