Calculate the momentum of a 1950 kg elephant charging a hunter at a speed of 7.50 m/s. (b) compare the elephant's momentum with that of a 0.0400 kg bullet fired at a speed of 600 m/s. (c) what is the momentum of the 90.0 kg hunter running at 8.00 m/s after missing the elephant?

In a wind tunnel the speed changes as the cross sectional area of the tunnel changes. if the speed in a 6' x 6' square test section is 100 mph, what was the speed upstream of the test section where the tunnel measured 20' x 20'? use conservation of mass and assume incompressible flow. conservation of mass requires that as the flow moves through a path or a duct the product of the density, velocity and cross sectional area must remain constant; i.e., that ova-constant. a model is being tested in a wind tunnel at a speed of 100 mph if the flow in the test section is at sea level standard conditions, what is the pressure at the model's stagnation point? (a) the tunnel speed is being measured by a pitot-static tube connected to a u- tube manometer. what is the reading on that manometer in inches of water? (b) at one point on the model a pressure of 2058 psf is measured. what is the local airspeed at that point?

How have the competing explanations' experiments on atoms affected the development of the atomic model?

Which planet do you think would be easiest for humans to colonize some day?