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Two meteoroids are 2.6×105 km from Earthand moving at 2.5 km/s. One is headed straight for Earth,while the other is on a path that will come within 8500 km of Earth's center. What is the speed of the first meteoroid when itstrikes Earth? What is the speed of the second meteoroid at itsclosest approach to Earth? Will the second meteoroid ever return toEarth's vicinity?
A uniformly charged wire or radius R1=0.02m runs down the axis of a cylinder of inner radius R2=0.06m. Find the electric field at the surface of the wire
A hypodermic needle consists of the plunger of circular cross-section that slides inside a hollow cylindrical syringe. When the plunger is pushed, the contents of syringe are forced through a hollow needle.
You are to make four straight-line moves over a flat desert floor,starting at the origin of an xy coordinate system andending at the xy coordinates (-135 m, 40 m). The xcomponent and y component of your moves are the following,respectively, in met..
A spherical shell has an outside radius of 2.45 cm and an inside radius of a. The shell wall has uniform thickness and is made of a material with density 4.74 g/cm3. What is this maximum mass
Two objects are attached to ropes that are attached to wheels on a common axle as shown below. The two wheels are glued together so that they form a single object. The total moment of inertia of the two wheels is 36 kg · m2
A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 56.11 diopters, and the lens-to-retina distance is 1.791 cm. (a) How far is the blackboard from her eyes? (b) If the writing on the blackboard i..
A neutron decays into a proton, an electron, and an anti-neutrino. Why can we state that the charge of the anti-neutrino must be zero?
Both surfaces of a double convex lens have radii of 30.0 cm. what is the index of refraction of the lens material
A cork on the surface of a pond bobs up and down two times per second on ripples having a wavelength of 9.20 cm. how long does it take a ripple passing the cork to reach the shore
a glass sheet 1.10 ?m thick is suspended in air. in reflected light there are gaps in the visible spectrum at 536 nm
Your friend's car is parked on a cliff overlooking the ocean on an incline that makes an angle of 19.9 below the horizontal. Find the length of time the car is in the air
A rocket moves straight upward ,starting from rest with an acceleration of +29.4 m/s2. it runs out of fuel at the end of 10.00 seconds, find the maximum height the reaches
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