A 19th century lab technician is testing possible metals for bulb filaments. A tungsten filament with a surface area of 0.370 mm² and an emissivity of 0.969 radiates 3.00 W of light. Determine the flament's temperature (in K). The melting point for tungsten is 3683 i Submit Answer 4 View Previous Question Question 16 of 19 View Next Question
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- Current Attempt in Progress A solar collector is placed in direct sunlight where it absorbs energy at the rate of 900 J/s for each square meter of its surface. The emissivity of the solar collector is e = 0.74. What equilibrium temperature does the collector reach? Assume that the only energy loss is due to the emission of radiation. Number Units eTextbook and Media GO Tutorial Save for Later11) Two identical metal plates are painted, one matt white and the other matt black. These are placed at equal distances from a radiant heater as shown in the diagram. The heater is turned on for five minutes 11 iko pe ara. erta ke matt white metal plate radiant matt black metal plate heater Which metal plate absorbs more energy and which plate emits more energy in this time? mengc an den im mas absorbs emits more more A black B black black C white D white white black whiteView 153% + Zoom Add Page Я Insert Table Chart T Text Shape Media Comment 2. Consider the ball example in the introduction when a ball is dropped from 3 meters. After the ball bounces, it raises to a height of 2 meters. The mass of the ball is 0.5 kg PHY250L a. What is the speed of the ball right before the bounce? Click here to enter text b. How much energy was converted into heat after the ball bounced off the ground? (Hint: Thermal Energy (TE) will now need to be included in your conservation of energy equation and you will now need to know the mass of the ball) Click here to enter text. c. What is the speed of the ball immediately after the ball bounces off the ground? Click here to enter text. Collaborate List Paragraph* Font Style Arial Regular B Character Styles Text Color Alignment = I ↑ E Spacing = Text Layout U * Format Document None* 1.5 Ꭶ bibl 3 More 11 pt ✡v > Bullets & Lists Imported Style 2* ✓
- Question 1: Choose the correct answer by writing A, B, C, or D. 1. A nuclear power station converts : A. Chemical energy to electrical energy B. Mechanical energy to electrical energy C. Heat energy to mechanical energy D. Heat energy to electrical energy 2. A steam turbine coverts : A. Chemical energy to electrical energy B. Mechanical energy to electrical energy C. Heat energy to mechanical energy D. Heat energy to electrical energyABC Question 6 You find a container filled with a liquid. The liquid is a pure substance. Which of the following wil NOT help you identify the liquid? O A Determining the freezing point of the liquid and comparing its freezing point to the freezing point of other liquids O B Determining the mass of the liquid and comparing its mass to the mass of other liquids Observing the color of the liquid and comparing its color to the color of other liquids Smelling the liquid and comparing its odor to the odor of other liquids ©2021 lluminate EducationTM. Inc. 10:21 A student was cooking chiken in the frying pan below. What transfer of heat between the pan and the chicken is responsible for cooking the chicken? A radiation B convection Ce lectrical conduction
- Plz solve correctlydo fast i will 5 upvotes.Have you ever chewed on a wintergreen mint in front of a mirror in the dark? If you have, you may have noticed some sparks of light coming out of your mouth as you chewed on the candy; and, without knowing it, you have experienced a physical phenomenon called triboluminescence. In this problem you will analyze some of the key elements of triboluminescence in wintergreen candies. Part C Image that the radiation emitted by the nitrogen at a frequency of 8.88×1014 Hz is absorbed by an electron in a molecule of methyl salicylate. As a result, the electron in the wintergreen oil molecule jumps to an excited state. Before returning to its ground state, the electron drops an intermediate energy level, releasing two-thirds of the energy previously absorbed and emitting a photon. What is the wavelength Xw of the photon emitted by the wintergreen oil molecule? Express your answer in nanometers to three significant figures. ► View Available Hint(s) Aw= Submit [-] ΑΣΦ ? nm