Lab Report Name: ____________________ Section: ___________________ EXPERIMENT: Hooke’s Law DATA TABLE 1: Spring 1 NOTE: Accumulated elongation is the total distance from the reference point, not the sum of increments. Force (N) Accumulated (cm) Elongation (stretch) Accumulated (m) Elongation (stretch) Elastic PE (Joules) Data Point 1 Data Point 2 Data Point 3 Data Point 4 Data Point 5 Data Point 6 Data Point 7 Data Point 8 Data Point 9 Data Point 10 DATA TABLE 2: Spring 2 NOTE: Accumulated elongation is the total distance from the reference point, not the sum of increments. Force (N) Accumulated (cm) Elongation (stretch) Accumulated (m) Elongation (stretch) Elastic PE (Joules) Data Point 1 Data Point 2 Data Point 3 Data Point 4 Data Point 5 Data Point 6 Data Point 7 Data Point 8 Data Point 9 Data Point 10 DATA TABLE 3: Rubber band NOTE: Accumulated elongation is the total distance from the reference point, not the sum of increments. Force (N) Accumulated (cm) Elongation (stretch) Accumulated (m) Elongation (stretch) Elastic PE (Joules) Data Point 1 Data Point 2 Data Point 3 Data Point 4 Data Point 5 Data Point 6 Data Point 7 Data Point 8 Data Point 9 Data Point 10 Questions: A. How does the relative stiffness of a spring relate to its spring constant? B. How does PE change relative to the stretch of the spring? C. Indicate on your graph for the rubber band where the linear behavior stops. What does this mean? D. Which is stronger in the region where Hooke’s law is obeyed, the spring or the rubber band? Explain. E. Explain what happens to the "spring constant" of the rubber band for the non-linear part of your curve.
1. A blue laser of wavelength 460 nm in air enters a diamond having a high index of refraction of 2.4. What is the wavelength of this light after it enters the diamond? 2. A flagpole of total height 3.0 m sits in a pool of water that is 2.0 m deep. The sunlight hits the top of the flagpole at an angle ? = 30° above the horizon. Calculate the total shadow length on the bottom of the pool. See figure. - Answer precision should be to 0.1, i.e. 1.1 or 15.4. - You must provide correct units for full credit 3. A laser pointer is held underwater in a pool that is 2.5 m deep. You wish to demonstrate total internal reflection. At what minimum distance from the edge of the pool (x) must I point the laser pointer to get Total Internal Reflection? [Notes: 1. Answer precision should be to 0.1, i.e. 1.1 or 15.4. 2. You must provide correct units for full credit] 4. A triangular glass block has an index of refraction of 1.5. A red laser pointer enters the glass perpendicular to side A. Calculate the transmission angle as the light exits side C. 5. On the first day of Summer in Murfreesboro, TN the Sun reaches a maximum altitude of 77.5°. This sunlight is incident on a calm pool of water. a. What is the angle of incidence of the Sun’s light on the water’s surface? b. At what angle is the light refracted into the water? c. What is the speed of light in the water? [Part C answers are scientific notation; for example, for 1.4 x 108 enter 1.4E8 as your answer.] d. What are the correct units for the answer in Part C?
A weight lifter is attempting to lift 150 N. The moment arm of this weight about her elbow joint is 25 cm. The force created by the elbow flexor muscles is 2000 N. The moment arm of the elbow flexor muscles is 2 cm. Is the athlete able to lift the weight with this amount of force in her flexor muscles?
From its discovery in 1930 up until 2006, Pluto was considered the ninth planet in the Solar System. After the International Astronomical Union revised and solidified the definition of a planet, poor Pluto was demoted to "dwarf planet," with the discovery of similar icy bodies beyond Neptune. A similar reclassification occurred for Ceres in the 19th Century. Do you think Pluto should still be designated a planet, or not? What about the other four classified dwarf planets? Consider the IAU definition and the characteristics of both planets and small bodies in the Solar System, and defend your position.
Type in 1-2 paragraphs Given that we are trying to map the Milky Way from the inside, the fact that we've deduced as much as we have is pretty amazing. Thinking about that mapping process and the use of astronomy in all part of the electromagnetic spectrum from radio to X-ray and gamma ray, explain which aspect of the Galaxy's structure do think is our most interesting - or hardest to understand - discovery? Give one example of astronomical observations that have aided astronomers in understand the Milky Way's size and structure.
