094 quiz 07 • Name:

12 March 2010

Clouds permitting, the quiz will start with a cloud quiz.

1. ______________________ Cloud type
2. ______________________ Cloud type
3. ______________________ Cloud type
4. _______________ During ten seconds a clapper claps 25 times. The echo flight distance is measured as being 140 meters. Based on this data, what is the speed of sound?

A RipStik was ridden across a wet cloth towel soaked in water with blue food color. The RipStik was then swizzled across a large sheet of presentation paper. The RipStik traveled a distance d of 83 centimeters in a straight line in a time t of 1.3 seconds. The swizzle wave mark made by the wheel had a wavelength λ of 23.5 centimeters. The oscillation rate for the RipStik wheel was measured as 3.5 cycles in 1.3 seconds. The amplitude A of the swizzle mark was 3.25 centimeters.

5. _______________ Calculate the linear velocity v for the RipStik.
6. _______________ Calculate the frequency f for the RipStik wheel.
7. _______________ Calculate the period τ in seconds for one oscillation of the RipStik wheel.
8. _______________ Calculate the velocity of the swizzle wave based on the wavelength and frequency.
9. _______________________________ Toughie: What is the name of the method of propulsion for a RipStik?
10. Does there appear to be a connection between the answer to question five and the answer to question eight? If yes, what is the connection?

Equations
[ $\mathrm{BMI}=\frac{m}{h\mathrm{²}}$ ] [ V = lwh ] [ m = ρV ] [ d = ѵt ] [ ѵ = at ] [ d = ½at² ] [ d = ½gt² ] [ $a=\frac{\Delta ѵ}{\Delta t}$ ]
[ τ = 1 ÷ f ] [ ѵ = λf ]