Interpreting Data
Based on the time measurements in the table, what
can be said about the speed of the car on the lower
track as compared to the higher track?
Distance
traveled
(m)
Lower track Higher track
elapsed time elapsed time
(s)
(s)
How can the reasoning for the above answer be best
explained? On the higher track, the elapsed time is
6.01
4.92
3.36
Calculate speeds for each track. How much faster was
the car on the higher track than the lower track?

Most of the volume of an atom is occupied by the

On a horizontal frictionless surface, a small block with mass 0.200 kg has a collision with a block of mass 0.400 kg. immediately after the collision, the 0.200 kg block is moving at 12.0 m/s in the direction 30° north of east and the 0.400 kg block is moving at 11.2 m/s in the direction 53.1° south of east. use coordinates where the +x-axis is east and the +y-axis is north.(a) what is the total kinetic energy of the two blocks after the collision (in ) what is the x-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your ) what is the y-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your answer.)

When you see distant streetlights through smog, they look dimmer and redder than they do normally. but when you see the same streetlights through fog or falling snow, they look dimmer but not redder. use your knowledge of the interstellar medium to discuss the relative sizes of the particles in smog, fog, and snowstorms compared to the wavelength of light.