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A 18800 kg helicopter lifts a 4700 kg truck with an upward acceleration of 1.5 m/s2. Compute (a) the net upward force on the helicopter blades from the air and (b) the tension in the cable among the helicopter and truck.
A hydrogen atom makes a transition from the n = 2 level to the ground state (corresponding to n = 1). Find the wavelength and the frequency of the emitted radiation
A car of mass M = 800kg travelling at 50km/hour enters a banked turn covered with ice. The road is banked at an angle 20degrees, and there is no friction between the road and the car's tires.
A ball of mass m is tied to a vertical (Cyclinder) post of radius R. The mass slides on a frictionless, What is the angular momentum of the ball after the string has wrapped once around the post
A 78 g ice cube at -18°C is placed in a lake whose temperature is 12°C. Calculate the change in entropy of the cube-lake system as the ice cube comes to thermal equilibrium with the lake. The specific heat of ice is 2220 J/kg·K. (Hint: Will the ice c..
Assuming the truck continues at constant speed from this minimum distance, for how long must the light remain yellow for the truck to completely clear the intersection before the light turns red.
converging lens with a focal length of 6.00cm forms an image of a 5.00mm -tall real object that is to the left of the lens. where are the object images located
A very distant galaxy has an apparent bolometric magnitude of +23.5. Determine the measured flux of photons
The two angled ropes used to support the crate in the figure below an withstand a maximum tension of 1600 before they break What is the largest mass the ropes can support
Suppose a car is traveling at +23.7 m/s, and the driver sees a traffic light turn red. After 0.360 s has elapse, What is the stopping distance of the car
A rugby player passes the all 7.00m across the field, where it is caught at the same height as it left his hand. How long did this pass take
A uniform ladder is 10m long and weighs 400 N. It rests with itsupper end against a frictionless vertical wall. Its lower end rests on the ground and is preventedfrom slipping by a peg driven into the ground. The ladder makes a 30?
A neutron star has a mass of 2.20 x 10^30 kg (about the mass of our sun) and a radius of 5.0 x 10^3 m (about the height of a good sized mountain). Assume an object falls from rest near the surface of such a star.
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