At the start of the flight, when the velocity of the rocket is zero, the ejected exhaust is moving to the left, relative to our coordinate system, at 2400 m/s. at the end of the first second, the rocket is moving at 40 m/s. the speed of the exhaust relative to our system is 2360 m/s. we could now compute the acceleration at t=1.0 s (using the decreased rocket mass), find the velocity at t=2.0 s, and so on, stepping through the calculation one second at a time until all the fuel is used up. as the mass decreases, the acceleration in successive 1 s intervals increases. a. find the rocket velocity after 2 seconds of launchb. find the rocket veloctiy after 3 seconds of launch.

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.

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

The necleus of an atom is made up of what subatomic particles?