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A meteorologist uses a Pitot-static tube to measure the wind speed in a tornado. Based on the damage caused by the storm, the tornado is rated as EF5 on the Enhanced Fujita Scale. This means that the wind speed is estimated to be in the range of 261 to 318 mph. Is it reasonable to use the incompressible Pitot-tube equation (Eq. 3.16) to determine the actual wind speed, or must compressible effects to taken into account? Explain.(Eq. 3.16)
One point-like charge of +20 nC sits at the center of a thick spherical shell of inner radius 4 cm and the outer radius 6cm. The shell is made of copper and has a net charge of -10 nC.
A major-league pitcher can throw a baseball in excess of 44.2m/s. If a ball is thrown horizontally at this speed, how much would it drop by the time it reaches the catcher who is 16.10 m away from the point of release.
A small plastic sphere with a charge of -5.0 nC is near another small plastic sphere by a charge of -14 nC. If the spheres repel each other with a force of magnitude 8.8x10-4 N, what is the distance among the spheres?
a 17.0-n block rests on a horizontal surface. the coefficients of static and kinetic friction between the surface and
Two children, 30kg and 50kg sit on opposite ends of a 4m longuniform see-saw with mass 80kg. How far from the center ofmass of the see-saw, and closer to which child should the fulcrumbe placed in order to get an equilibrium?
a pellet gun fires ten 2.9 g pellets per second with a speed of 540 ms . the pellets are stopped by a rigid wall. what
A moderate wind accelerates a pebble over a horizontal xy plane with a constant acceleration = (5.80 m/s2) + (7.00 m/s2). At time t = 0, the velocity is (3.6 m/s). What are magnitude and angle of its velocity when it has been displaced by 12.6 m para..
A water pump draws about 6 A when connected to 240 V. What is the cost (with electrical energy at 17 cents per kWh) of running the pump for 13 h
A 0.10kg block oscillates back and forth along a straight line on a frictionless horizontal surface. Its displacement from the origin is given by: x = (10cm)cos[(10 rad/s)t + pi/2 rad)]. what is the maximum speed acquired by the block
An artificial satellite circling the Earth completes each orbit in 118 minutes. Find the altitude of the satellite
A rocket is projected upward from the earth's surface (r = RE) with an initial speed v0 that carries it to a distance r = 1.8 RE from the center of the earth. What is the launch speed v0
A common flashlight bulb is rated at 0.108 A and 3.28 V (the values of current and voltage under operating conditions). estimate the temperature of the tungsten filament when the bulb is turned on
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