Ineed with this !
1. when light is scattered a is created.
2. describe how we see using the 6 parts of the eye.(list 6 parts of the eyes)
3. describe how we hear using the 8 parts of the ear (list 8 parts of the ear)
4. what do we call the material any wave travels through?
5. sound are caused
6. sound travels in .
7. a sound will travel in a denser medium.
8. what happens to the molecules when they are heated?
9. what are 3 ways heat transfer energy?
10. how does convection in the earth's mantle move plates?
11. what happens during thermal expansion?
12. how radiation is related to em waves?
13. what is contraction? what would cause it to happen?
i would very apprecieate if you guys me all of 13 questions

In a wind tunnel the speed changes as the cross sectional area of the tunnel changes. if the speed in a 6' x 6' square test section is 100 mph, what was the speed upstream of the test section where the tunnel measured 20' x 20'? use conservation of mass and assume incompressible flow. conservation of mass requires that as the flow moves through a path or a duct the product of the density, velocity and cross sectional area must remain constant; i.e., that ova-constant. a model is being tested in a wind tunnel at a speed of 100 mph if the flow in the test section is at sea level standard conditions, what is the pressure at the model's stagnation point? (a) the tunnel speed is being measured by a pitot-static tube connected to a u- tube manometer. what is the reading on that manometer in inches of water? (b) at one point on the model a pressure of 2058 psf is measured. what is the local airspeed at that point?

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.