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The tungsten filament of a certain 100 W light bulb radiates 2.50 W of light. (The other 97.5 W is carried away by convection and conduction.) The filament has surface area of 0.150 mm2 and an emissivity of 0.950. Find the filament's temperature. (The melting point of tungsten is 3683 K.)
A 2 kg projectile is shot straight up with initial velocity v0= 50 m/s. find the Maximum value of the gravitational potential energy
An airplane is flying in a horizontal circle at a speed of 100 m/s. The 80.0-kg pilot does not want her radial acceleration to exceed 7g. (a) What is the least radius of the circular path? (b) At this radius, what is the force causing the centripe..
An object slides down a 30o angle slope from rest at a height of 15.0 m. What is the object's speed at the bottom of the slope
When the Sun is directly overhead, a hawk dives toward the ground with a constant velocity of 4.75 m/s at 59.5° below the horizontal, Calculate the speed of her shadow on the level ground
A rocket moves upward, starting from rest with an acceleration of 29.9 m/s2 for 3.31 s. It runs out of fuel at the end of the 3.31 s but does not stop. Evaluate how high does it rise above the ground?
Sewage at a certain pumping station is raised vertically by 5.13 m at the rate of 1 860 000 liters each day. The sewage, of density 1 050 kg/m3, Assume an electric motor continuously operating with average power 3.85 kW runs the pump. Find its effi..
Consider a regular hexagon of side length, L = 10cm. A charge, Q = 2µC, is located at each vertex, Find the electric field vector at the center
A piece of glass has a temperature of 71.0 °C. Liquid that has a temperature of 38.0 °C is poured over the glass, evaluate the specific heat capacity of the liquid
Consider a rectangular swimming pool of depth 1 m with a width and length of 16 m. What is the total force on the bottom of the pool due to the water pressure
A jet airplane in level flight has a mass of 8.65 104 kg, and the two wings have an estimated total area of 94.0 m2. what is the speed of the air over the wings
Find the work done by the force on the particle as it moves across the following distances, from x = 0 m to x = 4.00 m
ConsideragainFig.1.12.Nowletthe14-kgweighthangfromthemid- dle of the lower arm (20 cm from the fulcrum). Calculate the biceps force and the reaction force at the joint
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