Which of the following is an example of a testable scientific hypothesis?

a) why do plants grow better in the sun than in the shade?

b) peacocks have prettier tail feathers than pigeons do.

c) roses grow faster in the sun than in the shade

d) gorillas are happier in the wild than they are in the zoo.

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

What is the role of lenses in microscopy?