- 4- A lump of gold-silver alloy has a mass of 350.8 and a volume of 20cm'. Assuming that no change in volume occurs when gold is alloyed with silver, find the mass of silver in the alloy. (Use the density of silver = 10.5g/cm", density of gold = 19.3g/cm) (4mks).

Write the correct abbreviation for each metric unit

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 record distance in the sport of throwing cowpats is 81.1 m. this record toss was set by steve urner of the united states in 1981. assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) determine the initial speed of the projectile. m/s