What is speed? science

a. time per distance (hours per mile or seconds per meter)

b. distance per time ( miles per hour or meters per second)

c. time ( hours or seconds)

d. distance ( miles or meters)

second questions

which of the following is an example of velocity?

a. 10m/s to the right

b. 10 m/s

c. 10

d. 10 m to the right

Speed is B. Distance per time. An example can be the speed of a car. Let's say that this car is moving at a constant speed of 35 mph. This means that the distance is 35 miles, per hour (time).

Velocity is Speed with direction. In this case, A. 10 m/s to the right is your answer, for it gives distance (10 meters per second), as well as direction (velocity).

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- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.