A spring-loaded ejector seat launches a 65 kg pilot out of an airplane, which flies horizontally at 98 m/s. The spring is compressed by 1.2 m, and has a constant of 3100 N/m. If the plane's initial altitude was 770 m, how fast is the pilot travelling when he has fallen to a height of 340 m?

F500 j of energy were added to 1 kg of each of these samples, which would experience the least temperature increase?

A26 cm object is 18 cm in front of a plane mirror. a ray of light strikes the object and is reflected off the mirror at a 42-degree angle. what is the angle of reflection? degrees what type of image is formed? what is the size of the image? cm

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.