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In order to shorten the distance required for landing, a jet airplane is equipped with moveable vanes which partially reverse the direction of the air discharged by each of its engines. Each engine scoops in the air at a rate of 120 kg/s and discharges it with a velocity of 600 m/s relative to the engine. At an instant when the speed of the airplane is 270 km/h, determine the reverse thrust provided by each of theengines.
The radius of the earth's very nearly circular orbit around the sun is 1.5 x 1011 meter. Compute the magnitude of the earth velocity as it travels around the sun. Suppose a year of 365 days
Tarzan swings through the jungle by hanging from a vine. Immediately after he steps off the branch, Find the Tarzan acceleration is zero or nonzero
A 35-kg child is holding for dear life on a playground merry-go-round that has a radius of 2.5m and is turning at a rate of one turn every 5 seconds. What's is the child's acceleration relative to the ground
An object of mass 10 kg is initially at rest. What is the change in the kinetic energy of this object
A disabled tanker leaks kerosene (n = 1.20) into the Persian Gulf, creating a large slick on top of the water (n = 1.30). If you are looking straight down from an airplane, while the Sun is overhead, at a region of the slick where its thickness is 43..
An uncharged capacitor is connected to a 44.0V battery until it is fully charged, after which it is disconnected from the battery. What will now be the voltage between the plates
A steel cable with total length 30 m and mass 100 kg is connected to two poles. find the wavelength of the resulting wave on the cable
A projectile is fired at v0 = 433.0 m/s at an angle of 69.0o with respect to the horizontal. Assume that air friction will shorten the range by 35.1%. How far will the projectile travel in the horizontal direction
A bolt on an engine is to be tightened with a maximum torque of 75 Nm. If a wrench has a length of 0.30 m, what is the maximum force perpendicular to the length that should be used to tighten the bolt?
A capacitor is completely charged with 670 nC by a voltage source that had 275 V. It's capacitance is 2.44nF. What is the stored energy if the air gap is now 4 mm
A silicon sample is doped with phosphorus at 1.23 parts per million. Phosphorus acts as an electron donor, Calculate the number of free electrons per unit volume of the doped silicon.
Lilly is unloading15 kg bottles of water from her delivery truck when one of the bottles tips over, What is the force that moves the bottle down the ramp
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