For normal vision, an object can be seen clearly when it is beyond the ______________
Fill in the blank(s) with correct word
near point
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Convection is a mode of energy transport between materials that requires close contact between the atoms
Indicate whether the statement is true or false
A 60.0-kg man stands at one end of a 20.0-kg uniform 10.0-m long board. How far from the man is the center of mass of the man-board system?
A) 1.25 m B) 2.50 m C) 5.00 m D) 7.50 m E) 9.00 m
A fireman is sliding down a fire pole. As he speeds up, he tightens his grip on the pole, thus increasing the vertical frictional force that the pole exerts on the fireman. When the force on his hands equals his weight, what happens to the fireman?
A) The fireman comes to a stop. B) The fireman descends with slower and slower speed. C) The fireman descends with a smaller but non-zero acceleration. D) The fireman continues to descend, but with constant speed. E) The acceleration of the fireman is now upward.
A binary star system in the constellation Orion has an angular separation between the stars of 10-5 radians. Assuming a wavelength of 700 nm, what is the smallest aperture (diameter) telescope that will just resolve the two stars? (1 nm = 10-9 m)
a. 8.5 cm c. 6.1 cm b. 4.2 cm d. 3.0 cm