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The Pitot tube on a supersonic aircraft (see Video V3.8) cruising at an altitude of 30,000 ft senses a stagnation pressure of 12 psia. If the atmosphere is considered standard, determine the airspeed and Mach number of the aircraft. A shock wave is present just upstream of the probe impact hole.
A concert loudspeaker suspended high off the ground emits 42 W of sound power. A small microphone with a 1.0 cm2 area is 43 m from the speaker. (a) What is the sound intensity at the position of the microphone
Use the data of this table to find the point between Jupiter and the Sun at which an object can be placed so that the net gravitational force exerted by Jupiter and Sun on this object is zero
A 7.0-mm diameter hole is 1.0m m below the surface of a 2.0m diameter tank of water. What is the rate, in mm/min, at which the water level will initially drop if the water is not replenished
A plane accelerates from rest at a constant rate of 5.00m/s2 along a runway that is 1800m long. What is the time t needed to take off
The pendulum pictured above has a length of 15.0 cm when it is displaced to the right of the peg, Determine the period for this pendulum close to the surface of the Earth
A uniform board with a length of 1.2 m and mass 5 kg is placed on two scales as show below A weight W with mass 20kg is placed on the board 20 cm from it center. Each balance is located 10cm from the end of the beam. What are the readings (in Newt..
A transformer for an answering machine takes an acvoltage of amplitude 150 V as its inputand supplies a 7.9 V amplitude to the answering machine. The primary has 400turns.
A girl is using a rope to pull a box that weighs 300 N across a level surface with constant velocity. What is the friction force of the floor on the box
A light bulb is wired in series with a 133-? resistor, and they are connected across a 120-V source. What are the two possible resistances of the light bulb
You are moving into an apartment and take the elevator to the 6th floor. Suppose your weight is 630 N and that of yourbelongings is 970 N. (a) Determine the work doneby the elevator in lifting you and your belongings up to the 6thfloor (15.2 m) at ..
An arrangement of two pulleys, as shown in the figure, is used to lift a 50.0-kg mass a distance of 4.70 m above the starting point. What is the change in the potential energy of the weight
When the tungsten filament in a 60 W, 120 V light bulb reaches 2010degrees C, 60 W of electric power is used to produce light andheat. Find the current through the filament under these conditions which are established very shortly after the light i..
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