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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.)
An object 6 cm high is placed 30 cm from a concave mirror of focal length 10 cm, Calculate size of image
A car starts from the origin and is driven 1.1 km south and then 3.5 km in a direction 53° north of east. what is the car's final location
Amorosa, who is on a balcony 40 m above the ground, throws the key to her heart at 37 degrees below the horizontal to Pedro on the ground. At what angle was the key moving when he caught it
A child tries to swing an adult size baseball bat without choking up on it. She can manage only 180 °/s of angular velocity with a radius of 75 cm. Compute the linear velocity of the endpoint of the bat in each case
Zinc has a density of 7.14 g/cm3, and the mass of a zinc atom is 1.09 10-25 kg. What is the distance between the centers of adjacent atoms
An object's moment of inertia is 2.00kgm2 . Its angular velocity is increasing at the rate of 3.80, What is the total torque on the object
Two moles of an ideal gas at 200 K occupies a 40 m3 container. What is the pressure of the gas
If the amplitude of a particle in simple harmonic motion is doubled, how are the total energy and maximum speed affected
An electron is moving northwards with a velocity 10^7 m/s in a magentic feild of 3T directed eastwards. Calculate the instaneous force on the electron
A solid insulating cylinder of radius A is surrounded by a hollow, concentric conducting cylinder of inner radius A and outer radius B. What is the total charge on the solid cylinder
A bolt is to be tightened with a torque of 8.0 Nm. what is the least amount of force you must exert
Suppose that you are traveling on board a spacecraft that is moving with respect to the earth at a speed of 0.976c. what is your breathing rate
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