imagine you are designing a new backpack. which of the following statement(s) about
why you might choose different materials for different parts of the design is false?
a. different materials are best suited
to different tasks.
b. this is not a good idea, you should
always make the design out of only
one material.
c. it is important to test materials to
know what will work best in the final
design.
d. both a and c

What precautions should you take to prevent injuries when dealing with heavy loads?

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature

Which from the following instrument is commonly used to detect the high pitch butzing sound in bearings? [clo4] a)-digital ultrasonic meter b)-infrared camera c)-spectroscopic d)-vibrometer