Because burning fossil fuels creates much pollution, alternatives are being investigated. What might limit the use of wind as a major source of energy? A
The strength of the wind varies.
В.
Wind power does not create pollution.
Wind machines have huge blades to capture the wind.
D. Turbines and generators in the wind machines create energy.

One of the brightest comets of the 20th century was comet hyakutake, which passed close to the sun in early 1996. the orbital period of this comet is estimated to be about 30,000 years. find the semi-major axis of this comet’s orbit. compare it to the average sun-pluto distance and to the distance to alpha centauri, the nearest star to the sun, which is 4.3 light-years distant.

The process by which liquid water changes into water vapour is called what ?

A2 cm object is 10 cm from a convex lens that has a focal length of 4.4 cm, the image is 8cm from the lensz the height of the image, to the tenths place is