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at the earths surface a projectile is launched straight up at a speed of 84 kms to what height will it rise ignore air
100g of aluminum at 200c and 220g of copper are dropped into 420cm3 of ethyl alcohol at 15c the temperature quickly
radiation from the head is a major source of heat loss from the human body model a head as a 20-cm-diameter 20-cm-tall
a 11m times13m house is built on a 15cm -thick concrete slabwhat is the heat-loss rate through the slab if the ground
a when a falling meteoroid is at a distance above the earths surface of 290 times the earths radius what is its
a 500kg cart is rolling to the right at 370ms a 700kg man is standing on the right end of the cartpart a what is the
a ball of weight 15 n is thrown at an angle of 30deg above the horizontal with an initial speed of 12 ms at its highest
a typical nuclear reactor generates 1000mw 1000mjs of electrical energy in doing so it produces 2000mw of waste heat
a frictionless pulley i12mr2 has a mass of 250kg and a radius of 200cm a 150kg stone is attached to a very light wire
an iron disk has a radius of 0525 m and a mass of 377 kg the disk is mounted on its axis so that it is free to spina
a manchine part has the shape of a uniform sphere of mass 225g and diametere 300cm it is spinning about a frictionless
a solid uniform spherical boulder i25 mr2 starts from rest and rolls down a hill the top 14 of the hill is rough enough
a 10 kg object is moving with a constant velocity 20 ms toward the north what is the second force that acts on the
the 50 cm tall objectarrow is located 75 cm away from the diverging lens plane focal length 50 cma draw the ray
a 41 kg ball oscillates with a period of 26 seconds and an amplitude of 23 cma what is the spring constantb what is the
an object of mass 2 kg is moving on a spring with a frequency of 120 hz and an amplitude of 15 m what is the force in
a five kilogram block and a four kilogram block are placed at either end of a compressed spring the system is initially
a solid spherical ball rolls 70 meters without slipping along a ramp inclined at 35 degrees to the horizontal what will
a ball is thrown directly downward with an initial speed of 780 ms from a height of 294 m after what time interval does
a stone is launched straight up by a slingshot its initial speed is 192 ms and the stone is 140 m above the ground when
a nuclear power plant operates at 76 of its maximum theoretical carnot efficiency between temperatures of 630c and 360c
a car with a mass of 950kg is travelling east when it collides with a truck of mass 1900kg that is travelling south the
an ice-making machine operates in a carnot cycle it takes heat from water at 00degc and rejects heat to a room at
you have a parallel-plate ideal capacitor with a capacitance of 23f that you connect to a 4v battery until it is fully
a bungee cord is stretched between two poles with a force of 382 n the length of the cord is 36 meters and it has a