Which of the following quantities is a velocity?
a. 25 m/s
b. 3 g/l in weight
c. 15 m/s2
d. 10 km/hr eastward

What do butterflies have on their feet which allows them to sense different strengths and types of nectar? a.mechanoreceptors b.acoustic receptors c.substratum receptors d.chemoreceptors

Which of the following explains why it took so long for the public to accept the negative health effects of smoking? a)people were waiting for counter reasons, and those were presented.b)scientists had not completely finalized their results, which took 30 years.c)cigarettes were cheaply available and media channels were very inefficient.d)cigarette manufacturers were trying hard to bring an alternative into the market

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of