What is the general term for a substance that is harmful to life and may cause death?

innocuous

toxic

benign

hypoallergenic

Describe harmful effect associated with extraction of Aluminum, Gold and Copper. Discuss each individually.

An astronaut is doing an EVA at the ISS. He is trying to screw in a bolt with a special zero-gravity wrench. After an hour of unsuccessfully using it, it breaks.

When a specific property is multiplied by the mass of the system the results is always an intensive property. a) True b) False

The intake and exhaust processes are not considered in the p-V diagram of Otto cycle. a) true b) false

For what two reasons do countries specialize? Countries specialize so that opportunity costs can be increased. Countries specialize to excel in the production of specific goods and services.

A house has a black tar, flat, horizontal roof. The lower surface of the roof is well insulated, while the upper surface is exposed to ambient air at 300K through a convective coefficient of 10 W/m2-K.

To enable cooking a wider range of foods in microwave ovens, thin, metallic packaging materials have been developed that will readily absorb microwave energy.

How do you distinguish between internal and external irreversibilities?

In 2008 502 motorcyclists fire in Florida - an increase from The number killed in 2004

A 1'x1' square concrete pile is embedded 20 feet in clay with an undrained shear strength of 2,800 psf. Based on the LaTeX: / alphaα-method and LaTeX: / alphaα-values of Terzaghi et al.