How deep under the surface of a lake would the pressure be triple that at the surface? (1 atm = 1.01 × 10^5 Pa)
a. 1.00 m
c. 10.3 m
b. 9.80 m
d. 20.6 m
D
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Recent experiments suggest that the lifetime of the proton is over 1033 years, more than what is predicted by the simplest grand unified theories
a. True b. False Indicate whether the statement is true or false
The eyepiece of a compound microscope has a focal length of 2.50 cm, and the objective has a focal length of 1.60 cm. The two lenses are separated by 14.0 cm. The microscope is used by a person with normal eyes, having a near point at 25 cm
What is the magnitude of the magnification of the microscope? A) 72 B) 88 C) 180 D) 219 E) 115
At which of the following temperatures would one liter of water weigh the most?
a. 2°C b. 4°C c. 8°C d. 90°C e. It would weigh the same at all these temperatures.
The nearest naked-eye star to our Sun, Alpha Centauri, is still over a parsec distant
Indicate whether the statement is true or false