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A shell is fired with a horizontal velocity in the positive x direction from the top of an 80-m high cliff. The shell dtrikes the ground 1330 m from the base of the cliff.
A) Determine the initial speed of the shell.
B) What is the magnitude of the velocity of the shell as it hits the ground.
C) What is the magnitude of the accelerartion of the shell just before it strikes the ground.
Use Newton law to determine the force applied to the backrest when a 150-lb person leans 40% of his or her body weight against it. Determine the constant requiered for the spring
A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 62.12 diopters, How far is the blackboard from her eyes
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Describe the interference of two wave pulses with different amplitudes if they are a) in phase and b) completely out of phase
A pop bottle style instrument is played being open at one end closed at the other, if two successive frequencies, 350 Hz and 490 Hz, are produced, what is the fundamental frequency,
A man strides across a bed of embers. Assume the glowing charcoal is covered with a thin layer of ash 0.50 mm thick and is at a temperature of 650C. The thermal conductiviity of ash and charcoal is 1.5 W/ (mxK). (a) Estimate the heat transferred t..
How would you determine the density of an irregularly shaped rock, Is buoyant force a conservative force
A solenoid 88.0 cm long has a radius of 2.60 cm and a winding of 2000 turns; it carries a current of 3.60 A. Calculate the magnetic field outside the solenoid
assume the coefficient of kinetic friction between m_{rm A} and the plane in the figure is mu_k = 0.15, and that m_{rm{A}} = m_{rm{B}} = 2.7{rm{ kg}}. What smallest value of mu _{rm{k}} will keep the system from accelerating.
The water in a tank is at a gauge pressure of 259,145 Pa. If the bottom of the tank that has an area of 0.5 m2
You land on a new planet with radius 5000km. You measure the freefall acceleration due to gravity to be 8.5m/s^2 at the surface
A 9000pF capacitor holds plus and minus charges of 1.35×10?7C . What is the voltage across the capacitor
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