Physics Questions and Answers January 28, 2020

The following data were obtained in a resin burnoff test of an Eglasspolyester sample Weight of an empty crucible 10.1528 g Weight of crucible sample before burnoff 10.5219 g Weight of crucible sample after burnoff 10.3221 g Calculate the fiber weight fraction, the fiber volume fraction, and the density of the composite sample. Assume Pr 2.54

Describe the resin transfer method of incorporating fibers into polymer matrix, listing all the materials used in the design of the process. What parameters may influence the quality of the resin transfer molded part?

What is if the difference in the terms gel-time and cure time as pertaining to the composite polymer. List some of the factors that affect each of these in the polymerization process.

The Bede BD5J is a very small singleseat homebuilt jet airplane which became available in the early 1970s. The data for the BD5J are as follows Wing span 17 ft Wing planform area 37.8 ft2 Gross weight at takeoff 960 Ib Fuel capacity 55 gal Power plant one Frenchbuilt Microturbo TRS 18 turbojet engine with maximum thrust at sea level of 202 Ib

The diagram shows a single slit with the direction to a point P on a distant screen (not shown). At P, the pattern has its maximum nearest the central maximum. If X and Y are the edges of the slit, what is the path length difference (PX) ? (PY)?

incident light to P

The difference in density between hot air and cold air results in the chimney effect which draws air through many heating appliances. Suppose a fireplace has a chimney that is 15 m high. The chimney is filled with air at 300 degrees C. the outdoor air temperature is 0 degrees C. At the top of the chimney, both the air in the chimney and the

At Geoncnetic the Earth's magnetic pole in the field northern hemisphere, the magnetic field has a strength of 0.6 G and points down toward the center of the Earth. You deduce that the Earth's magnetic field must be produced by a current loop deep inside the Earth! You guess that the radius of the loop is about 1300 km (the radius of the liquid

Gegmagnetic field upper Kubducting slab outer core plume head inner core plume tal slab remnant lower mande continent erogeny continent usasagas

The enzyme Fumarase has the following kinetic constants: S + E ↔ ES → P + E where k1 and k-1 are the rate constants of the reversible reaction step (forward and reverse reaction, respectively) and k2is for the irreversible step. The values of k1,k -1 ,and k2 are 10 9 M -1 s -1 , 4.4 x 10 4 s -1 , and 10 3 s -1 . (a) What is the value of