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There are competitions in which pilots fly small planes low over the ground and drop weights, trying to hit a target. A pilot flying low and slow drops a weight ; it takes 2.0 s to hit the ground, during which it traveled a horizontal distance of 100m. Now the pilot does a run at the same height but twice the speed. How much time does it take the weight to hit the ground? How far does it travel before it lands?
A spherical mirror is to be usedto form, on a screen located 4.50 m from the object, What should be the magnitude of its radius of curvature
the speed of sound in an alcohol at a temperature of 20 c is 1260 ms. the density of the alcohol at that temperature is
A 1 m long wire, fixed at both ends, is supporting a standing wave with 3 anti-nodes, and a frequency of 500 Hz. what is the tension on the wire
A green hoop with mass mh = 2.7 kg and radius Rh = 0.17 m hangs from a string that goes over a blue solid disk pulley with mass md = 2.3 kg and radius Rd = 0.09 m. The other end of the string is attached to a mass less axel through the center of an o..
A solenoid is designed to produce a magnetic field of 0.220 T at its center. It has radius 4.00 cm and length 100.0 cm, and the wire can carry a maximum currentof 8.0 A.
a transparent oil of index of refraction 1.29 spills on the surface of water index of refraction 1.33 producing a
Which one of the following statements concerning spherical mirrors is correct?
An F-18 jet fighter flies directly overhead at a height of 18000mat 5/3 the speed of sound. Make a diagram that adequately illustrates thesituation and shows the parameters used to calculate the angle ofthe shock wave.
A particularly beautiful note reaching your ear from a rare Stradivarius violin has a wavelength of 39.1 cm. The room is slightly warm, so the speed of sound is 344 m/s. Part A If the string's linear density is 0.560g/m and the tension is 160N , how ..
the barrel of a ri?e has a length of 0.942 m. a bullet leaves the muzzle of a ri?e with a speed of 580 ms. what is the
The only two forces acting on a body have magnitudes of 20N and 38N and a directions that differ by 76 degrees. What is the mass of the body
A lunar lander is landing on the moon from 5.0 m above the surface, with a downward speed of 0.8 m/s. With the engine off, it is in free fall. find the speed of the lander just before it hits the surface
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