What forces cause the Earth to assume the shape of an oblate ellipsoid?
What will be an ideal response?
Outward force of the Earth's rotation
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A level pipe contains a nonviscous, incompressible fluid with a density 1200 kg/m3 that is flowing steadily. At one position within the pipe, the pressure is 300 kPa and the speed of the flow is 20.0 m/s
At another position, the pressure is 200 kPa. What is the speed of the flow at this second position? A) 567 m/s B) 16.2 m/s C) 32.9 m/s D) 23.8 m/s E) 186 m/s
According to current models of solar system formation, why did Uranus and Neptune end up to be much less massive than Jupiter and Saturn?
A) Particles in the solar nebula were more spread out at greater distances, so that accretion took longer and there was less time to pull in gas before the solar wind cleared the nebula. B) Ices were able to condense at the distance of Jupiter and Saturn, but only rock and metal could condense at the distances of Uranus and Neptune. C) The solar nebula had different chemical composition at different distances from the Sun, leading to the differences in mass. D) The size differences are thought to be a random coincidence.
Three infinite planes of charge, A, B and C, are vertical and parallel to one another. There is a uniform electric field 
to the left of plane A and a uniform electric field 
to the right of plane C. The field
src="https://sciemce.com/media/2/ppg__cognero__Chapter_25_Gauss_apos_s_Law.__media__d157b51e-e802-42c3-b389-ecf53d0f5676.PNG" style="font-family:'times new roman';vertical-align:middle;" /> points to the left and the field points to the right. The signs of the charges on plates A, B and C may be
A. ?, ?, ?.
B. +, ?, ?.
C. +, ?, +.
D. +, +, +.
E. any one of the above.
A space station of diameter 80 m is turning about its axis at a constant rate. If the acceleration of the outer rim of the station is 2.5 m/s2, what is the period of revolution of the space station?
A. 22 s B. 19 s C. 25 s D. 28 s E. 40 s