Ionly have 10 points so,

1. the earbones vibrate and transfer sound.
true
false

2. black cloth will appear red through a red glass.
true
false

3. an opaque substance transmits light.
true
false

4. x-rays are a part of the electromagnetic spectrum.
true
false

5. the colors at sunset are usually the result of raindrops.
true
false

6. a ball appears red in sunlight. check all the correct statements:
the ball absorbs all colors except red.
the ball reflects all colors and absorbs red.
the ball absorbs red and then reflects black.
the ball reflects only red

7. when an object reflects all the light which falls on it, its color will be:
white
black
rainbow
neutral

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.)