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A uniform drawbridge must be held at a 35.0?angle above the horizontal to allow ships to pass underneath. The drawbridge weighs 4.05×104N , is 13.5m long, and pivots about a hinge at its lower end. A cable is connected 3.25m from the hinge, as measured along the bridge, and pulls horizontally on the bridge to hold it in place.
If the cable suddenly breaks, what is the initial angular acceleration of the bridge? (in rad/s^2)
A particular amplifying device supplies electrons in a manner such that the current passing out of the device, Determine the charge that passes out of the device if left on for 30 seconds
A laser used to weld detached retinas emits light with a wavelength of 654nm in pulses that are 20.2ms in duration. How much energy is in each pulse
A factory worker moves a 23.0kg crate a distance of 4.90m along a level floor at constant velocity by pushing horizontally on it. What magnitude of force must the worker apply
A conveyor belt at a quarry lifts 2,000 kg of sand per minute up a vertical distance of 12 meters. The sand is at first at rest, then moves at a speed of 0.20 m/s along conveyor belt. What is the instantaneous power generated by this machine .
Consider a pump that is required to compress air in a factory. The cylinder in the pump has an inner diameter of 2.00 cm and length 60.0 cm. What is the increase in internal energy of the gas
Find the de Broglie wavelength of electrons with kinetic energies of 30 eV. Answer all in pm. Find the de Broglie wavelength of electrons
What is the temperature of the outside air. What are the components of the displacement vector from camp to summit? What is its magnitude? select the x axis east, y axis north, and z axis up.
A hemispherical shell of radius a=1 cm has a surface charge density of m=4.00 uC/m^2. What is the magnitude of the electric field produced by the shell at the spherical center
A 21.5 g bullet strikes a 0.650 kg block attached to a fixed horizontal spring whose spring stiffness constant is 7.30 x 10^3 N/m and sets it into vibration with an amplitude of 21.5 cm. What was the speed of bullet before impact if the bullet and bl..
Calculate the force required to pull a copper ball of radius 3.00 cm upward through a fluid at the constant speed 6.00 cm/s
Consider a solid that sublimes (goes from solid to gas) at 300K. In the solid phase, the molecules have six degrees of freedom and u0=-0.15 eV, What is the latent heat of sublimation in joules per mole
The potential difference between two parallel conducting plates in vacuum is 475 V, What is the kinetic energy of the alpha particle when it reaches the other plate
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