4) A crate is at rest on an inclined plane. As the slope increases the crate remains at rest until the incline reaches an angle of 32.7°from the horizontal. At this angle the crate
begins to slide down the ramp.
A) What is the coefficient of static friction between the crate and the surface of the
ramp?
B) If the coefficient of kinetic friction between the surface of the ramp and the crate is

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.

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system