Which of the following is the largest dwarf planet?
a. Ceres
b. Mercury
c. Pluto
d. Eris
d
Physics & Space Science
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A concrete tensile test specimen fractures at a tensile stress of 4 MPa. Estimate the length of internal cracks in this concrete specimen if this type of concrete has a KIc of 0.3 MPa?m1/2.
What will be an ideal response?
Physics & Space Science
The human eye can just detect green light of wavelength 500. nm, which arrives at the retina at the rate of 2 × W. How many photons arrive each second?
What will be an ideal response?
Physics & Space Science
An electric diode is useful for
A) storing electrical energy. B) boosting voltage. C) limiting current. D) voltage modification. E) changing ac to dc.
Physics & Space Science
Historical evidence suggests that the methods of modern science were originated by the
A) Mayans B) Egyptians C) Greeks D) Babylonians
Physics & Space Science