Calcium and boron react to form calcium boride, as represented by the chemical equation below.
Ca + 6 B → Cabo
Which type of reaction is shown by this equation?
A. double displacement B. single displacement
C. synthesis
D. decomposition

Road users moving into your lane, brake lights, and abrupt changes in road surface are a. rare at night b. indicators of potential hazards c. not worth worrying about before you reach them d. no problem for experienced drivers

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

Certain bacteria (such as aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they contain tiny particles, called magnetosomes, that are sensitive to a magnetic field. if a transmission line carrying 100 a is laid underwater, at what range of distances would the magnetic field from this line be great enough to interfere with the migration of these bacteria? (assume that a field less than 5% of the earth’s field would have little effect on the bacteria. take the earth’s field to be 5.0 * 10-5 t, and ignore the effects of the seawater.)