You are at the leading end of a canoe and your friend is at the trailing end while the canoe is drifting along at a speed v. You toss a backpack to your friend. While the backpack is in flight, what is the canoe's speed? Ignore any friction effects between the canoe and the water
1.It is greater than v.
2.It is less than v.
3.It maintains the same speed it had before the backpack was thrown.
4.We cannot tell from the information given.
1
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Spectra of stars often show narrow absorption lines from interstellar matter. What type of interstellar matter produces these?
A) dust B) neutral gas C) ionized gas D) molecules E) All of the above.
The maximum speed of a 3.00-kg object in simple harmonic motion is 4.00 m/s. The maximum acceleration of the object is 5.00 m/s2. What is the period of simple harmonic motion?
A) 1.25 s B) 0.417 s C) 0.800 s D) 5.03 s E) 3.75 s
The continuous part of an x ray spectrum of an atom occurs because
a. of photon absorption b. of the photoelectric effect c. electrons in the atom make transitions to lower energy levels d. of the uncertainty principle e. of rapid deceleration of the bombarding electrons
How much energy is in an 89.7 MHz photon of FM-radiation?
a. 2.2 × 10^?33 J b. 9.5 × 10^?27 J c. 7.4 × 10^?42 J d. 5.9 × 10^?26 J e. 3.7 × 10^?25 J