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How long would it take a car to return to its starting place if it traveled 180 m/s average speed of 90 km/hr and returned to its starting place along the same straightline path? (Neglect the time that the car takes to turn around.)
A meteorite has a speed of 75.0m/s when 800km above the Earth. It is falling vertically (ignore air resistance) and strikes a bed of sand in which it is brought to rest in 3.50m. How much thermal energy is produced? What is its speed just before stri..
if a block of continental crust and a block of oceanic crust are both 10 km thick and are floating on the
At relatively high temperatures nitrogen and oxygen more readily form a compound according to: N2(g) + O2 2NO(g). Calculate kp given that the initial pressures of nitrogen are 95 atm and 80 atm
Tarzan swings on a 30.0-m-long vine initially inclined at an angle of 30.0° with the vertical. What is his speed at the bottom of the swing if he starts from rest
A telescope mirror has a radius of curvature of 18.0 m. What is the diameter of the image of the Moon produced by this mirror
A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -20.6 µC. How many excess electrons does she get
A 27-cm-long wire with a linear density of 25 passes across the open end of an 83-cm-long open-closed tube of air. What is the tension in the wire
the voltage across a capacitor is given by the formula vqc where q is usually called the charge on the capacitor. where
Binoculars denoted as 7 x 50 have a total magnification of 7 times and objective lenses of 50- mm diameter. What is the focal length of the eyepiece if the objective focal length is 25.5 cm?
A conducting sphere carrying a charge ‘q' has a radius ‘a'. It is inside a concentric hollow conducting sphere of inner radius ‘b' and outer radius ‘c'. What is the charge on the outer surface
Big yellow fish swimming at 2.0m/s swallows little green fish at rest. Big yellow fish is 3 times as massive as little green fish. What fraction of big yellow fish's initial kinetic energy was lost in this collision
During a solar eclipse, the moon, earth and sun all lie on thesame line with the moon between earth and the sun, what force isexerted by the sun on the moon
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