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

Amass has an acceleration of 10- 2t. what is its velocity and displacement if it started at x- 4m and the initial velocity was 8m/s? at what time does it have 0 velocity? graph all graphs.

As part of an industrial process, air as an ideal gas at 10 bar, 400k expands at steady state through a valve to a pressure of 4 bar. the mass flow rate of air is 0.5 kg/s. the air then passes through a heat exchanger where it is cooled to a temperature of 295k with negligible change in pressure. the valve can be modeled as a throttling process, and kinetic and potential energy effects can be neglected. (a) for a control volume enclosing the valve and heat exchanger and enough of the local surroundings that the heat transfer occurs at the ambient temperature of 295 k, determine the rate of entropy production, in kw/k. (b) if the expansion valve were replaced by an adiabatic turbine operating isentropically, what would be the entropy production? compare the results of parts (a) and (b) and discuss.

Asubject in a clinical research trial experiences a serious, unanticipated adverse drug experience. how should the investigator proceed, with respect to the irb, after the discovery of the adverse event occurrence? a. do not report the adverse drug experience to the irb since it is a common adverse experience.b. report the adverse drug experience to the irb only if there are several other occurrences.c. report the adverse drug experience as part of the continuing review report.d. report the adverse drug experience in a timely manner, in keeping with the irb's policies and procedures, using the forms or the mechanism provided by the irb.