A rocket engine uses fuel and oxidizer in a reaction that produces gas particles having a velocity of 1380 ms-1

. The desired thrust is to be 195000 N.
16. What must be the fuel/oxidizer consumption rate (in kg s-1
)?
16.
17. If the initial weight of the rocket is 125000 N, what is its initial acceleration?
17.
18. What are the weight and acceleration of the rocket at t = 15.0 s after
ignition? 18.

19. What are the weight and acceleration of the rocket at t = 20.0 s after ignition?

Asteam power plant operates on an ideal reheat rankine cycle between the pressure limits of 15 mpa and 10 kpa. the mass flow rate of steam through the cycle is 12 kg/s. steam enters both stages of the turbine at 500°c. if the moisture content of the steam at the exit of the low-pressure turbine is not to exceed 10 percent, determine (a) the pressure at which reheating takes place, (b) the total rate of heat input in the boiler, and (c) the thermal efficiency of the cycle. also, show the cycle on a t-s diagram with respect to the saturation lines. (2.15 mpa; 45.0 mw; 42.6%)

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.

Compare the patterns of the two waves shown in the image. which statement is true about these waves?