Majority of the mass of the galaxy's halo is made up of white dwarfs
Indicate whether the statement is true or false
False
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Olbers's paradox is solved in part by the fact that the universe is neither infinitely large nor infinitely old
Indicate whether the statement is true or false
When you throw a stone horizontally from the top of a cliff at 10 m/s, one second after leaving your hand its vertical distance below the top of the cliff is
1) 5 m. 2) 10 m. 3) 15 m. And its speed at that instant is 4) 10 m/s. 5) about 14 m/s. 6) 15 m/s. 7) greater than 15 m/s.
In Young's two-slit experiment, the distance between the slits and the screen is 1.1 m and the distance between the slits is 0.040 mm
If the second order bright fringe is measured to be 4.2 cm from the centerline, what is the distance between the adjacent fringes? A) 6.3 cm B) 3.1 cm C) 1.3 cm D) 2.1 cm E) 4.2 cm
An electron in a cathode ray tube is accelerated through a potential difference of 8.0 kV. What kinetic energy does the electron gain in the process? (e = 1.6 × 10^?19 C)
a. 1.0E–15 J b. 1.3E–15 J c. 1.0E–21 J d. 5.0E–16 J e. 1.3E–21 J