PiP Mystery Cache

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green ducks: Freeing up the area

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Hidden : 9/29/2010
Difficulty:
4 out of 5
Terrain:
2 out of 5

Size: Size: small (small)

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Geocache Description:


The cache is not at the posted coordinates.

To find the location of the medium size lock and lock, you must go back to your high school physics notes, and solve the following questions. A scientific calculator might come in handy.


The cache is located at: N 51 AB.CDE W 114 FG.HIJ (please note that this has been changed from the original which contained a typo)


A: Given Earth’s atmosphere is 120 km thick, how long would a meteor, with a constant velocity of 40 km/s, take to travel through the atmosphere to the Earth’s surface (assume no atmospheric friction).

a) 0.33 s = 1
b) 3.0 s = 0
c) 4.8 s = 3
d) 10 s = 2


B: A car accelerates at 10 m/s2 for 6.0 s and reaches a final velocity of 82 m/s. The initial velocity of the car was:

a) 3.7 m/s = 0
b) 8.2 m/s = 4
c) 22 m/s = 7
d) 60 m/s = 9


C: Pluto is the smallest planet in our solar system (let's pretend!!). It’s gravitational constant is only 6.0% of earth’s value (0.060 *g).
If a woman has a mass of 50 kg on earth, what is her mass (m) and weight (W) on Pluto?

a) m=50 kg - W=29 kg = 0
b) m=29 kg - W=50 kg = 8
c) m=50 kg - W=29 N = 4
d) m=29 kg - W=50 N =1


D: An object is swung at the end of a rope in a circle with a radius of 0.0470 m with a speed of 490 m/s. How long does it take to complete one revolution?

a) 5.13 x 10-3 s = 1
b) 6.03 x 10-4 s = 8
c) 1.90 x 10-4 s = 4
d) 5.13 x 10-4 s = 6


E: Jupiter is the largest planet in the solar system.
It has a mass of 1.90x 1027 kg and a radius of 7.18x107 m.
What is the acceleration due to gravity of an object near Jupiter’s surface?

a) 4.07 m/s2 = 8
b) 14.7 m/s2 = 5
c) 17.7 m/s2 = 7
d) 24.6 m/s2 = 1


F: What is the period of a pendulum with a length of 0.750 m?

a) 0.481 s = 9
b) 1.74 s = 0
c) 4.71 s = 2
d) 5.44 s = 6


G: A student standing on a dock finds that wave crests pass by the dock every 6 s. If she estimates the distance between the crests to be 20 m, that is the approximate speed of the waves?

a) 0.6 m/s = 0
b) 2 m/s = 3
c) 3 m/s = 5
d) 7 m/s = 8


H: As heard by a person at the scene of an automobile accident, the frequency of the sound from an approaching ambulance siren is:

a) lower than the frequency heard by the ambulance driver = 2
b) higher than the frequency heard by the ambulance driver = 6
c) equal to the frequency heard by a driver behind the ambulance = 9
d) lower than the frequency heard by a river behind the ambulance = 4


I: Which experimental design was used by Michelson to determine the speed of light?

a) Flash a light and note the reaction time of a person = 8
b) Measure the time for light to reflect off the moon. = 3
c) Place two mirrors at right angles and note the constructive and destructive interference. = 9
d) Use a rotating eight-sided mirror to reflect light to a fixed mirror. = 0


J: How much kinetic energy does a 1500 kg car have travelling at a constant speed of 100 km/h?

a) 7.5x106 J = 9
b) 7.5x104 J = 2
c) 2.1 x104 J = 6
d) 5.8x105 J = 1





j2d2

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