Duane has a mass of 73 kg and slides down an icy hill on a sled. The hill has a slope of 15° and there is no friction. The free-body diagram is shown below.

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 2 options: 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 cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.

An object in mechanical equilibrium is an object

Five structural isomers have the formula c6h14. where needed, draw the structure and give the iupac name of all five isomers.