An incandescent light bulb has a tungsten filament that is heated to a temperature of 3.20 × 103 K when an electric current passes through it. If the surface area of the filament is approximately 1.00 × 10−4 m2 and it has an emissivity of 0.360, what is the power radiated by the bulb?The Stefan–Boltzmann constant (σ) is 5.670 × 10−8 W/(m2·K4).

A 2-kilogram [kg] projectile traveling at 100 meters per second [m/s] is stopped by being shot into an insulated tank containing 100 kilograms [kg] of water. If the kinetic energy of the projectile is completely converted into thermal energy with no energy lost, how much will the water increase in temperature in units of degrees Celsius [°c]? The specific heat of water is 1 calorie per gram degree Celsius [cal/(g °C)]. Click the icon to view the conversion table. Click the icon to view conversion formulas for temperature scales. Click the icon to view the factors for conversions involving temperature differences. Click the icon to view the table of common derived units in the SI system. ..... The temperature will increase by °C. (Round your answer to four decimal places.)

Liquid helium is stored at its boiling-point temperature of 4.2 K in a spherical container (r = 0.30 m). The container is a perfect blackbody radiator. The container is surrounded by a spherical shield whose temperature is 91 K. A vacuum exists in the space between the container and the shield. The latent heat of vaporization for helium is 2.1 × 104 J/kg. What mass of liquid helium boils away through a venting valve in one hour?

What amount of energy is required to change a spherical drop of water with a diameter of 1.60 mm to five smaller spherical drops of equal size? The surface tension, y, of water at room temperature is 72.0 mJ/m². ΔΕΞ 0.00015 Incorrect mJ