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The average depth of oceans is about 4km, the oceans cover abou 70% of earths suface. Make an order of nagnitude estimate of the waters volune in he ocean.
A force is applied to an initially stationary block of mass 3.60 kg that sits on a horizontal floor as shown. The 47.6 N force is applied at ? = 58° angle. The coefficients of friction between the floor and the block are ?s = 0.453 and ?k = 0.203. Wh..
A certain fluid has a density of 1110 kg/m3 and is observed to rise to a height of 2.5 cm in a 1.0-mm-diameter tube. Calculate the surface tension of the fluid
A coil with resistance 0.05( and self-inductance 0.01H is connected across a 12-volt battery of negligible internal resistance. a) How long after the switch is closed will the current reach 95% of its final value.
A capacitor has parallel metal plates separated by an air gap of .250mm. The arrangement has capacitance of 285pF (1 pf = 10^-12 Farads) and the plates are given opposite charges of +85 nC and - 85nC.
A 2 kg car moving towards the right at 4 m/s collides head on with an 8 kg car moving towards the left at 2 m/s, After the collision, the velocity of the combined bodies is
How many 65W light bulbs can be connected in parallel across a potential difference of 85 V before the total current in the circuit exceeds 2.10A.
A 200 gm block of metal is heated to 100 degrees Celcius in boiling water. This block is after placed in an aluminum calorimeter cup (mass - 30gm; c - .22 cal/g degrees C) containing 180 gm of water at 20 degrees C.
A 1.40 kg iron horseshoe is taken from a forge at 950°C and dropped into 4.00 kg of water at 14.0°C. Assuming that no energy is lost by heat to the surroundings, determine the total entropy change of the horseshoe-plus-water system.
A 1026 kg car and a 2210 kg pickup truck approach a curve on the expressway that has a raduis of 264 m. find the normal force on the truck to the highway surface
A 23-g bullet traveling 225 m/s penetrates a 3.2-kg block of wood and emerges cleanly at 185 m/s If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?
A rescue helicopter lifts a 80.7-kg person straight up by means of a cable. Use the work-energy theorem and find the final speed of the person
A ball is attached to one end of a wire, the other end being fastened to the ceiling. The wire is held horizontal, Find the velocity (magnitude and direction) of the ball
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