11 .Bronze is made by mixing molten copper and tin. If 100 kg of the mixture contains 80% by mass of copper and 20% by mass of tin. Calculate the density of bronze (density of copper 8900 kgm and density of tin 7000 kg/m^3) (5mks) ​

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

Acar traveling at 22 m/s starts to decelerate steadily. it comes to a complete stop in 15 seconds. what is it’s acceleration?

The temperature at a point (x, y) is t(x, y), measured in degrees celsius. a bug crawls so that its position after t seconds is given by x = 6 + t , y = 8 + 1 3 t, where x and y are measured in centimeters. the temperature function satisfies tx(3, 9) = 5 and ty(3, 9) = 4. how fast is the temperature rising on the bug's path after 3 seconds? (round your answer to two decimal places.)