Radio astronomers face a problem of radio interference analogous to light pollution
Indicate whether the statement is true or false
True
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Compound Microscope: The distance between the object to be viewed and the eyepiece of a compound microscope is 18.0 cm. The focal length of its objective lens is 0.80 cm and the eyepiece has a focal length of 2.3 cm. The near-point distance of the person using the microscope is 25.0 cm. What is the magnitude of the total magnification of the microscope if it is designed for minimum eyestrain?
A. 120 B. 184 C. 200 D. 360 E. 480
Two objects of different masses have momentum of equal, non-zero magnitude. Which object has more kinetic energy?
A) the heavier object B) the lighter object C) They both have the same kinetic energy.
Which of the following statements is not true about the planets so far discovered around other stars?
A) Photographs reveal that most of them have atmospheres much like that of Jupiter. B) Many of them have been discovered by observing Doppler shifts in the spectra of the stars they orbit. C) Most of them are more massive than Earth. D) Many of them orbit closer to their star than Jupiter orbits the Sun.
Two pistons push down on the fluid filling two cylinders connected by a narrow hose, as shown in the figure. The area A1 is 1 square inch, and the area A2 is 10 square inches. A force of 4 pounds is exerted downward on piston 1, as shown
 The pressure on A2 in psi is a. 0.25. b. 0.4. c. 4. d. 10. e. 40.