The center of mass of an object does not have to be located within the object
Indicate whether the statement is true or false
TRUE
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What causes erosion?
a. wind b. water c. glacier ice d. all of the other choices.
Matter Waves: Electrons emerge from an electron gun with a speed of 2.0 × 106 m/s and then pass through a double-slit apparatus. Interference fringes with spacing of 2.7 mm are detected on a screen far from the double slit. What would the fringe spacing be if the electrons were replaced by neutrons with the same speed? (h = 6.626 × 10-34 J ? s, melectron = 9.11 × 10-31 kg, mneutron = 1.675 × 10-27 kg)
A. 1.5 ?m B. 4.9 m C. 0.93 nm D. 1.2 km
Which of these forms of radiation passes most easily through the disk of the Milky Way?
A. red light B. blue light C. infrared light
A cylindrical tank is assembled by welding steel sections circumferentially. Tank diameter is 1.5 m, thick- ness is 20 mm, and internal pressure is 2.0 MPa. The maximum shear stress in the heads is approximately:
(A) 19 MPa
(B) 23 MPa
(C) 33 MPa
(D) 35 MPa
