The separation between Africa and Arabia is a(n) ____________________ valley
Fill in the blank(s) with correct word
rift
You might also like to view...
A black hole consists of a large ________ in a small space.
Fill in the blank(s) with the appropriate word(s).
In 1992, COBE observations revealed
A) there are small ripples in the microwave background, the seeds of galaxies. B) that the universe had less than the critical density, so was open. C) the dark matter in the universe is normal (baryonic), so the universe is closed. D) the existence of dark energy. E) the microwave background radiation is not isotropic, but centered on Virgo.
A simply supported laminated beam of length L 5 0.5 m and square cross section weighs 4.8 N. Three strips are glued together to form the beam, with the allowable shear stress in the glued joint equal to 0.3 MPa. Considering also the weight of the beam, the maximum load P that can be applied at L/3 from the left support is approximately:
(A) 240 N
(B) 360 N
(C) 434 N
(D) 510 N
Two masses m1 and m2, are separated by a distance r. The forces of attraction between the two masses is F.
a. if m1 is doubled, how does F change? b. if neither of the masses were changed, but r was doubled, how would F change? c. if r was not changed but both masses were doubled, how would F change? d. if r was halved and both masses were doubled, how would F change?