20-21 English
If the diameter of the black marble is 3.0 cm, and by
using the formula for volume, what is a good
approximation of its volume? Record to the ones place.
cm3
lumalalalalalalim
150 ml
140
130
120
110
100
90
80
70
60
50
40
30
20
10
Determine the initial volume of water in the graduated
cylinder. If you added the black marble to the graduated
cylinder and it sinks, what final volume should the
water level indicate? Record to the ones place.
mL
d= 3.0 cm
Hulu
Intro

Follow these directions and answer the questions. 1. set up the ripple tank as in previous investigations. 2. bend the rubber tube to form a "concave mirror" and place in the ripple tank. the water level must be below the top of the hose. 3. generate a few straight pulses with the dowel and observe the reflected waves. do the waves focus (come together) upon reflection? can you locate the place where the waves meet? 4. touch the water surface where the waves converged. what happens to the reflected wave? 5. move your finger twice that distance from the hose (2f = c of c, center of the curvature) and touch the water again. does the image (the reflected wave) appear in the same location (c of c)? you may have to experiment before you find the exact location. sometimes it is hard to visualize with the ripple tank because the waves move so quickly. likewise, it is impossible to "see" light waves because they have such small wavelengths and move at the speed of light. however, both are examples of transverse waves and behave in the same way when a parallel wave fronts hit a curved surface.

A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?

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