Which of the following provides the best example of a solenoid?

a.
a long straight wire with one end connected to the positive terminal of a battery.

c.
a coil of wire looped around a permanent magnet.

b.
a coil of wire wrapped around a nail, with each end of the wire connected to the positive and negative terminals of a battery.

d.
a long loop of wire with each end connected to the positive and negative terminals of a battery.

How does an observation about an object differ from an inference about that object

Which component of the earth’s atmosphere is decreased due to photosynthesis?

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to