A72.0 kg man stands on a spring scale in an elevator. starting from rest, the elevator ascends, attaining its maximum speed of 1.70 m/s in 1.20 s. it travels with this constant speed for the next 5.00 s. the elevator then undergoes a uniform acceleration in the negative y-direction for 1.80 s and comes to rest.(a) what does the spring scale register before the elevator starts to move? (b) what does it register during the first 1.20 s? (c) what does it register while the elevator is traveling at a constant speed? (d) what does it register during the time it is slowing down?

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

Which body is in equilibrium? (1) a satellite orbiting earth in a circular orbit (2) a ball falling freely toward the surface of earth (3) a car moving with a constant speed along a straight, level road (4) a projectile at the highest point in its trajectory