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An 80 kg window cleaner sits 1.8 meters from the end of a 5 meter long scaffold that is supported at either end by a vertical wire. Suppose the scaffold is a uniform beam by a mass of 40 kg and find the tension in each wire.
A typical flying insect applies an average force equal to twice its weight during each downward stroke while hovering. estimate the average power output of the insect
is the buoyant force on an object that is attached to a light sting and submerged completely in water the same as the
A camera is supplied with two interchangeable lenses, whose focal lengths are 35.0 and 150.0 mm. What is the height (including sign) of her image on the film
A 0.500 kg football is thrown toward the east with a speed of15.0 m/s. A stationary receiver catches the ball and brings it torest in .020 s. What is the average force exerted on the receiver
an astronaut in his space suit and with a propulsion empty of gas propellant stapped to his back has a mass of 146kg.
A 0.95 102 g mass of tungsten at 100.0°C is placed in 2.10 102 g of water at 20.0°C. The mixture reaches equilibrium at 21.6°C. Calculate the specific heat of tungsten
You are a secret agent and find that you have been pushed out of an airplane without a parachute. Fortunately, you are wearing a large overcoat, what is your new terminal velocity with the coat
A plane of a 5.0 cm x 8.0 cm rectangular loop of wire is parallel to a 0.19 -T magnetic field. The loop carries a current of 6.2 A. What is the magnetic moment of the loop
A double-slit experiment uses light of wavelength 633 nm with a slit separation of 0.1 mm and a screen placed 2.0 m away. What is the linear width of the central fringe
A compact disk, which has a radius of 6.0cm, What is the tengential acceleration of a point on the outer rim of the disk at the moment when its angular speed is 2.00 rev/s
the flywheel of a car engine is a solid disk with a mass of 8.7 kg and a radius of 22 cm and is rotating at 4000 rpm.
In an experiment designed to measure the speed of light, a laser is aimed at a mirror that is 49.0 km due north. A detector is placed105 m due east of the laser. The mirror is to be aligned so thatlight from the laser refelects into the detector
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