In a lab investigation, one group of students (group a) measures the speed or a 0.1 kg toy cat w vc212
m/s at the bottom of a ramp. another group of students (group b) measures the speed of the car to be 3
m/s at the bottom of the ramp. the car's starting position at the top of the ramp is 1 m high.
a. what is the potential energy of the car at the beginning of the experiment before its speed is
measured?

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

c. magnitude and direction