1. An object of mass mi=3kg, moving with a velocity of 20m/s in the positive x- direction, collides with and sticks to an object of mass m2=2kg moving with a velocity of 10 m/s in the negative x-direction. What the final velocity of the composite system

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.)

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?

What was the first instrument to ever record an earthquake?