One of the goals of wildlife refuges is to prevent humans from interacting with wildlife.
true or false

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .

If a computer chip switches off -on-off in 0.015 us, what is the switching time in nanoseconds?