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A jet with mass m=130000kg jet accelerates down the runway for takeoff at 2.1m/s^2. What is the net horizontal and vertical force on the airplane as it accelerates for takeoff?
The lowest pedal note on a large pipe organ has a fundamental frequency of 16 Hz, What is the length of the open-closed pipe that makes that note
High-speed stroboscopic photographs show that the head of a 200-g golf club is traveling at 45 m/s just before it strikes a 46-g golf ball at rest on a tee. Find the speed of the golf ball just after impact
A wheel (radius 0.6 m) is rolling on a horizontal surface with a center of mass acceleration of 0.7 m/s2. find the friction force acting between the wheel and the surface
A 0.400-kg block is attached to a horizontal spring that is at its equilibrium length, and whose force constant is 23.0 N/m. How far does the putty-block system compress the spring
A falling stone takes ?t = 0.26s to travel past a window2.2 m tall, From what height above the top of the window did the stone fall
q1. an airplane is flying with the velocity of 85.0 ms at an angle of 20.0 degrees above the horizontal. when the plane
Compressed air can be pumped underground into huge caverns as a form of energy storage. how many homes could this internal energy serve for one day
Assume air resistance is negligible; from what height (in cm) above the compressed spring was the block dropped.
An electron is bound in an infinite well (a box) of width 0.1nm. If the electron is initially in then n = 8 state and falls to the n = 7 state, find the wavelenght of the emitted photon
If the distance between two slits is 0.031 mm and the distance to a screen is 2.50 m, find the spacing between the first- and second-order bright fringes for yellow light of 500 nm wavelength.
A copper wire with a cross sectional area of 3.00 mm^2 and a length of 2.00 m at 20.0 degrees C is connected to a 25.0 V battery, what is the resistance at 20.0 degrees C
The ground state total energy, total entropy, and temperature are 5.00 Btu, 0.11690 Btu/R, and 50.0°F, respectively. If the total entropy of the cell must be ten times its ground state value,
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