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An elevator manufacturing company is stress-testing a new elevator in an airless test shaft. The elevator is traveling at an unknown velocity when the cable snaps. The elevator falls 1.40 m before hitting the bottom of the shaft. The elevator was in free fall for 0.900 s. Compute its velocity when the cable snapped.
the west antarctic ice sheets some 0.83 million km2 and only 6 of the total antarctic ice surface have an average
looking directly downward from a boat you see a shark that appears to be 4.5 m below the waters surface. whats the
A block of mass m1 = 3.90 kg on a frictionless inclined plane of angle 30.0° is connected by a cord over a massless, What is the magnitude of the tension in the cord
The time separating high tides is 12 hours and 25 minutes. Assume that the high tide occurs at 3:30 p.m. one afternoon. At what time will high tide occur the next afternoon
An 800 kg car coasts down a hill 40 m high with engineoff and driver's foot pressing on break pedal. How much energy was converted into heat on the waydown
Find the frequency in terahertz of visible light with a wavelength of 485 nm in vacuum. What is the wavelength in centimeters of electromagnetic microwave radiation whose frequency is 7.61 GHz?
A 1.0--diameter oil droplet (density 900 kg/m^3) is negatively charged with the addition of 28 extra electrons. What is the surface charge density of the plane
A merry-go-round is 11m in diameter. The outermost horses are set at a diameter of 10m. If the merry-go-round spins at 2 RPM what is the tangential speed of the outermost horses?
A transverse electromagnetic plane wave with a frequency of 2.84 MHz travels directly away from you (- z direction). At time t = 0, your magnetic field detector measures a magnetic field of 4.57 × 10-8 Tesla pointing down (- y direction) which fur..
Light from a helium-neon laser (? = 630nm) is incident on a diffraction grating and then illuminates a screen that is 10 m away. what is the spacing between the slits in the grating
In figure (a), a 4.2 kg dog stands on a 15 kg flatboat at distance D = 6.1 m from the shore. It walks 2.1 m along the boat toward shore and then stops. Assuming no friction between the boat and the water, find how far the dog is then from the shore.
A firefighter standing on a ladder 4.20 meters in the air is using a water hose to put out a fire. How much work is done per minute in lifting the water from the ground
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