Aspacecraft consists of a 549-kg orbiter and a 235-kg lander. it’s moving at 66.6 km/s relative to a nearby space station along the horizontal x-axis. explosive bolts separate the orbiter and lander, after which the orbiter is moving at 47.2 km/s at a 41.4∘ angle to the motion of the original composite spacecraft (above the x-axis).

a. find the magnitude of the lander’s velocity.

b. find the direction of the lander’s velocity.

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.