In a transverse wave, particles move...?
a) Back and Forth
b) Up and Down
c) Vertically
d) Wherever the matter's going
Ans: b) Up and Down
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The average speed of stars relative to the Sun in the solar neighborhood is about 20 km/s. Suppose you discover a star in the solar neighborhood that is moving relative to the Sun at a much higher speed, say 220 km/s
What kind of orbit does this star probably have around the Milky Way? In what part of the galaxy does it spend most of its time? Explain.
A proton that is moving freely has a wavelength of 0.600 pm. (mproton = 1.67 × 10-27 kg, e = 1.60 × 10-19 C, h = 6.626 × 10-34 J ? s)
(a) What is its momentum? (b) What is its speed? (c) What potential difference would it have been accelerated through, starting from rest, to reach this speed?
A piece of aluminum has density 2.70 g/cm3 and mass 770 g. The aluminum is submerged in a container of oil of density 0.650 g/cm3 . A spring balance is attached with string to the piece of aluminum. What reading will the balance register in grams (g) for the submerged metal?
a. 955 g b. 185 g c. 585 g d. 2 430 g e. 1 010 g
The greenhouse effect occurs because carbon dioxide is opaque to infrared radiation
Indicate whether the statement is true or false