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Calculate the temperature at which a tung- sten filament that has an emissivity of 0.25 and a surface area of 6.6×10?5 m2 will radiate energy at the rate of 51Win a roomwhere the temperature is 26?C. The Stefan-Boltzmann constant is 5.6696 × 10?8 W/m2 · K4 . Answer in units of ?C.
A uniform thin rod of length 0.65 m and mass 4.5 kg can rotate in a horizontal plane about a vertical axis through its center. what is the magnitude of the bullet's velocity just before impact
It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.2 s, illustrate what is the average force exerted on the ball by the wall
While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 7.19 m/s. How much time is the stone in the air
A screen 1.8 m wide is located 3.6 m from a pair of slits illuminated by 620 nm laser light, Find the highest-order bright fringe that will appear on the screen of the slit spacing is .20 mm
A cube of wood having an edge dimension of 20.3 cm and a density of 647 kg/m3 floats on water. What is the distance from the horizontal top surface of the cube to the water level?
q. a 30 gram mass is hanging from a spring whose unstretched length is 20 cm and whose spring constant is 2.5 nm. in
Smoke particles in the air typically have masses of the order of 10^-16 kg. Find the root-mean-square speed of Brownian motion for a particle with a mass of 3.00 x 10^-16kg in air at 300K
Three astronauts, propelled by jet backpacks, push and guide a 114 kg asteroid toward a processing dock, exerting the forces, with F1 = 32 N, F2 = 52 N, F3 = 39 N, θ1 = 30°, and θ3 = 60°. What is the (a) magnitude and (b) angle (measured relative ..
You are standing at the rear end of a raft that is 6.0 m long. The raft has a uniform mass of 120 kg and is at rest on a lake. how far are you from the end of the pier
You are designing the section of a roller coaster ride. Previous sections of the ride give the train a speed of 14.9 m/s at the top of the incline, find the minimum radius you can use for the vertical loop
A dense rubber buoy is attached to a lead weight when it is accidentally lost overboard from an ocean going vessel. The density of the buoy at the surface was 661 kg/m^3.
A 3.90-kg object is attached to a spring and placed on frictionless, horizontal surface. Find the total energy of the oscillating system
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