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a camera is equipped with a lens with a focal length of 36 cm when an object 29 m 290 cm away is being photographed
describe the greenhouse effect that is occurring in the earths
electric force is a vector three charged objects are located at the corners of an equilateral triangle with sides 10 m
a juniper-wood plank measuring 032 ft by 1 ft by 12 ft is totally submerged in watera what is its weightb what is the
a certain object is composed of a solid sphere of mass 15 kg and radius 05 m connected to two thin rods of length 2 m
science the future and reflections on the course please respond to the followingidentify the main developments in
explain how flight is achieved please provide an example and usenbspthree concepts or laws to supportnbspyour
describe the relationship between electron orbital energy levels and the energy of light that electrons emit for atoms
in a car lift is used in service station compressed air exerts a force on a small piston that has a circular cross
an 1800 kg car stopped at a traffic light is struck from the real by a 900kg car the two cars become entangled moving
a 1500 kg car moving on a flat horizontal road negotiates a curve if the radius of the curve is 35m and the coefficient
suppose that one weekend day a hiker exerts 200 watts of power while ascending 300 meters on a steep trail without a
a mass on a spring vibrates in simple harmonic motion at a frequency of 40 hz and an amplitude of 40 cm if a timer is
an elevator is moving downwards at 4ms when suddenly someone hits the stop button and it travels another 29 m before
a block with mass m 66 kg is hung from a vertical spring when the mass hangs in equilibrium the spring stretches x 027
letnbspg0 magnitude of the gravitational acceleration at the surface of the earthnbsprnbsp radius of the earth
what is the maximum efficiency that a heat engine could have when operating between the normal boiling and freezing
calculate the macroscopic thermal neutron absorption cross section for natural uranium ignore the trace amounts of234u
a metallic ring with the area of 10-4m2 is pierced with a magnetic field of 1 tesla perpendicular to the area during
in an electron gun electrons are accelerated from the cathode negatively charged plate toward the anode positively
below is the calculator result for the operation indicated enter the answer to the correct number of significant
a small rubber ball is launched by a compressed-air cannon from ground level with an initial speed of 199 ms directly
a race car completes a lap on a 1600 m long track with an average speed of 250 kmh if the cars average speed on the
a jetliner goes from rest to a takeoff speed of 185 mih in 390 s what is the magnitude of its average
a truck travels due east for a distance of 14 km turns around and goes due west for 69 km and finally turns around