At 20 c an aluminum ring has an inner diameter of 5.000 cm, and abrass rod has a diameter of 5.050 cm. keeping the brass rodat 20 c, what temperature of the ring will allow the ring to justslip over the brass rod? (αal = 2.4 x 10^-5/c) (αbrass = 1.9 x10^-5/c)
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What is the solubility of substance?

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

How have the greenhouse gasses increased from the year 2000 to 2018