Collect the following objects from around the house. 3 - rectangular items 2 - triangular items 3 - 3 dimensional rectangular item Click the Activity button to open the data table. Download the document, complete the measurements, and make the appropriate calculations.

Hydrogen and helium are both members of?

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.