نقطة واحدة Thermal diffusivity of a : substance is inversely proportional to conductivity

Which of the following statements are correct in the context of thermal conductivity? (Check all that apply.) Check All That Apply The thermal conductivity of gases is proportional to the square root of absolute temperature. The thermal conductivity of liquids is proportional to the square root of absolute temperature. The thermal conductivity of most liquids decreases with increasing temperature. The thermal conductivity of most liquids increases with increasing temperature.

Internal energy includes (choose all what apply) O Vibrational energy of particles energy in chemical bonds Rotational energy of particles Translational energy of particles

1) A 0.30-kg ball is attached at the end of a 0.90-m-long stick. The ball and stick rotate in a horizontal circle. Because of air resistance, a continual push must be exerted on the stick to keep the ball moving at a constant speed, causing a 0.036-Nm torque. Draw an extended force diagram showing the forces exerted on the ball and stick and use it to determine the magnitude of the resistive force that the air exerts on the ball opposite its motion. What assumptions did you make? Ability A14: Is able to construct an extended force diagram Needs Work Inadequate FD contains no errors in vectors or vector placement but lacks a key feature such as labels of forces with two subscripts or the location of the intended axis of rotation. FD is constructed but contains major errors such as incorrect or mislabeled force vectors, forces exerted from incorrect locations, or does not identify the axis of rotation. Ability D7: Is able to choose a productive mathematical procedure for solving the…

By the sign convention, heat transfer is positive when a system receives energy from its surroundings in a process. True False 的00

What is the magnitude of only the x component of BG?

Global Consumption (2016) CO2 350 kg/MWh 260 kg/MWh 200 kg/MWh Type of Fuel Coal 44 billion MWh Oil 51 billion MWh Natural Gas 37 billion MWh Table 1: Global fossil fuel consumption, 2016 4. Globally, fossil fuel energy use was about 132 billion megawatt-hours (MWh) in 2016. Table 1 shows the individual estimates for coal, oil, and natural gas, as well as the carbon intensity of each fuel, given in kilograms of CO2 per MWh of energy consumed. For example, each MWh of coal that is burned releases about 350 kg of CO2. Use the table to estimate the total amount of CO2 (in kilograms, kg) that was emitted in 2016 from the burning of fossil fuels. Start by estimating the amount emitted for each fuel type. Then find the total. You may find it beneficial to use scientific notation. For example 44 billion MWh is 44 × 10° MWh (or 44E9, as entered into your calculator). Round to two significant digits in your final answer.

A heating element made of tungsten wire connected to a large battery that has negligible internal resistance. When the heating element reaches 80.0°C, it consumes electrical energy at a rate of 480 W. Assume that the temperature coefficient of resistivity has the value given in Table 25.2 in the textbook and that it is constant over the temperature range in this problem. In the equation R(T) = Ro [1 + a(T - To)] take To to be 20.0°C. Part A What is its power consumption when the temperature of the heating element is 110.0°C? Express your answer with the appropriate units. P = Submit Value Provide Feedback Request Answer Units ?