An object requires a force of 30 N to hold it under water. The object weighs 90 N in air. Its density is nearest:
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In the context of the double-slit experiment, quantum uncertainty refers to
A) the fact that the particles of matter or radiation are instantaneously replaced by a spread-out matter field or EM field when the particles impact the screen. B) the fact that the electron beam or light beam goes through both slits rather than only one. C) our inability to precisely predict the point at which a spread-out matter field or EM field will interact with the screen. D) the fact that the entire matter field or EM field instantaneously collapses to the single interaction point when the field interacts with the screen. E) the fact that each interaction with the screen occurs over a broad area of the screen.
Doubling the diameter of a loop of wire produces what change of induced emf?
A. The induced emf is 4 times as much. B. The induced emf is twice as much. C. There is no change in the induced emf. D. The induced emf is 6.28 times as much.
You live at a latitude of 73° N. What is the angle between the northern horizon and the north celestial pole?
a. 73° b. 27° c. 17° d. 23 ° e. 5°
2.00 moles of an ideal gas at standard temperature and volume changes its temperature by 1
What is the change in the pressure?
A. 371 Pa B. 323 Pa C. 301 Pa D. 298 Pa E. 273 Pa