Which of the following is a physical property of nonmetals?

a.
they are shiny

b.
they are poor conductors of electricity

c.
they are very strong in the solid form

d.
they are all non-reactive elements

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .