Arollercoster car and passengers of total mass 1800kg starts from rest at 80m above the ground. ignoring air resistance and friction what will the speed be:
at ground level
at top of the next peak which has height of 30m
take gravity 10n/kg
i calculated it as 1697m/s, by converting gravitational potentional energy to kinetic energy to calculate the velocity/speed.
did you do the same?

70 give a real life example showing how sensory neurons work with the motor neurons

Asquare 1m x 1m plate is shown below. all four of its edges are kept at 0 co. at t=0the temperature distribution is given by: y xtsins n75)=.a) using separation of variables determine the temperature distribution t(x,y,t)along the plate at any time t.b) discretize the heat conduction equation +=22222 txtusing a second-order centered difference scheme for the two second derivatives and a first-order forward euler scheme for the first derivative. using von neumann stability analysis, determine the stability criterion for the proposed discretization scheme in terms of , hand t. solve for the maximum allowable time step tmax

The path of a satellite orbiting the earth causes it to pass directly over two tracking stations a and b, which are 51 miles apart. when the satellite is on one side of the two stations, the angles of elevation at a and b are measured to be 87 degrees and 84 degrees, respectively. (a) how far is the satellite from station a? (b) how high is the satellite above the ground?