Problem 8 i estimate that the gauss gun (a solenoid) is wound with 500 turns over a distance of 15cm with an average radius of 1.5cm. the peak current is about 300a. calculate the energy stored in the gauss’ gun at peak current. use the infinite solenoid approximation. select one of the following: (a) 70j (b) 0.01j (c) 200j (d) 6000j (e) 0.3j

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?

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

Acompound machine is also called a machine. a. force b. simple c. complex d. directional