074 SC 130 Physical science test two: midterm • Name:

02 October 2009

1. ________________ A 45.0 gram rectangular slab of soap is 5.0 centimeters long, 3.0 centimeters wide, and 2.0 centimeters high. What is the volume of the rectangular slab of soap in cubic centimeters?
2. ________________ A 45.0 gram rectangular slab of soap is 5.0 centimeters long, 3.0 centimeters wide, and 2.0 centimeters high. What is the density of the rectangular slab of soap in grams per cubic centimeter?
3. ________________ Will a soap 45.0 gram rectangular slab of soap that is 5.0 centimeters long, 3.0 centimeters wide, and 2.0 centimeters high float OR sink in water?
4. ________________ Using the data below, what is the speed of the ball from zero seconds to one second?

   ball fall time (s)	ball fall distance (cm)
   0	0
   1	5
   2	20

5. ________________ Using the table above, what is the speed of the ball from one second to two seconds?
6. [toughie]________________ Using the table and speed calculations above, what is the acceleration of the ball?
7. ________________ What is the name of the shape of the arc of a juggling ball in the air?
8. ____________________ Given the equation $\text{d}=\frac{1}{2}\text{g}\left[{\text{t}}^2\right]$ where g = 980 cm/s², what is the duration in seconds for a ball to fall from a height of 500 cm?
9. ____________________ A baseball bat exerts a force of 200 Newtons (kg m/s²) on a baseball as the bat hits the ball. Calculate the force of the baseball on the bat at this instant of contact.
10. ____________________ The conservation of energy theory predicted that the speed of a marble at the bottom of a banana leaf ramp would given by the equation v = 37.42 √h where v is the speed of the marble and h is the vertical release height for the marble. The actual experimental data gathered during the laboratory was best fit by the equation v = 29.8 √h. What is the percentage error for an experimental value of 29.8 and a theoretic value of 37.42?
11. ____________________ How good is the agreement for the experimental slope, that is, how well does the data support the theory (weak, good, strong, excellent, perfect agreement)?
12. ___________________ What is the temperature of a mix of melting ice and water in Celsius?
13. ___________________ What is the temperature at which coconut oil liquifies (melts)/solifies (freezes) in Celsius?
14. ___________________ What is the typical daily room temperature in Pohnpei in Celsius?
15. ___________________ What is the temperature of the healthy human body in Celsius?
16. ___________________ What is the temperature of a boiling water in Celsius?
17. ___________________ A cover on a pot of hot water blocks which of three heat transfer (movement) processes?
18. ___________________ If you are laying on a towel on a cool ceramic tile floor, the towel blocks which of three heat transfer (movement) processes?
19. ___________________ Aluminum foil used as a sun shade blocks which of the three heat transfer processes?
20. [short essay with diagram] Why do strips of paper with air blowing across the top rise, airplane wings fly, and curve balls curve? These are all examples of the same single physical effect. Using diagrams and words, explain this phenomenon.