Paul is a physicist, observing the movement of a charged particle. The particle is moving in a straight line along the y-axis of an x-y plane. Its initial
velocity was –3 m/s, and its final velocity was 6 m/s. At the end of Paul's
observation, the particle's displacement was 3.75 meters in the positive
direction. How long was Paul observing the particle's motion?

A) 2.5 seconds

B) 5.6 seconds

C) 1.2 seconds

D) 4.2 seconds

Pl help me

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%)

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)