You put a thermometer in a pot of hot water and record the reading. What temperature have you recorded? (i) The temperature of the water; (ii) the temperature of the thermometer; (iii) an equal average of the temperatures of the water and thermometer; (iv) a weighted average of the temperatures of the water and thermometer, with more emphasis on the temperature of the water; (v) a weighted average of the water and thermometer, with more emphasis on the temperature of the thermometer.
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- According to the National Coffee Association, the best serving temperature of coffee is between 82°C to 88°C. One day you decided to take a coffee break at Falcon Garden and it was served with a temperature of 87°C and after 5 minutes you found out that the temperature of the coffee was decrease to 73°C. If the temperature at Falcon Garden is 20°C what is the temperature of your coffee after 18 minutes. (unit not needed)arrow_forwardThe following heat transfer formula quantifies the radiation emitted from the Sun: P = eoA(T4 – T?) Equation 5 where: P= radiated power (Watts) e = emissivity (=1 for ideal radiator; unitless) o = Stefan-Boltzmann constant = 5.67x10-8 W/m2-K+ A = radiating area (m²) T= temperature of radiator (Kelvin) Tc = temperature of surroundings (Kelvin) Q3 Using the following values, together with equation 5, calculate the power emitted by the Sun. sun's surface temperature = 5780 K temperature of the environment that the Sun is located in = 4 K emissivity of the Sun = 1 radius of the Sun = 695,700,000 m Stephen-Boltzmann constant o = 5.67 x 10-8 W/m2-K4 Show your work below-you may use the equation editor or insert a picture of your handwritten work.arrow_forwardPlease write the step-by-step solution following the formula: dHI/dt = dHI/dT x dT/dt +dHI/dhr x dhr/dtarrow_forward
- Q1. a) Choose which quantity/unit is fundamental, or derived quantity/unit by ticking (√ ). Sl No Quantity Fundamental Quantity Derived Quantity Fundamental Unit Derived Unit Example m/s √ 1 volume 2 J/kg 3 viscosity 4 N/m 5 Surface tension 6 Angular velocity 7 s-2 8 Heat flux density 9 V/m 10 Thermal conductivityarrow_forwardA window has dimensions of 1.65 m by 2.4 m and is made of glass 5.25 mm thick. On a winter day, the outside temperature is 22° C while the inside temperature is a comfortable at 17° C. (k of glass =0.085W/m.K) (1.5+1.5+2 = 5marks) Calculate the following: a) the area of the window in square metres b) the temperature gradient (AT/Ax)in kelvin/metre c) the rate of heat lost through the window by conduction in wattsarrow_forwardTwo thermometers are calibrated, one in degrees Celsius and the other in degrees Fahrenheit. At what temperature (in kelvins) do their readings measure the same temperature? 218.15 40.15 273.15 233.15arrow_forward
- You are trying to measure the outside temperature at a particular time. If you use three thermometers and place all three in direct sunlight, the sunlight is likely to cause your measurements to suffer from what kind of error? Group of answer choices A) Your measurements will suffer from systematic errors because the sunlight affects all measurements in the same way by making them too high by the same amount. B) Your measurements will suffer from a decrease in precision because the thermometer only uses whole numbers. C) Your measurements will suffer from random errors because they will be expressed as a percentage. D) Your measurements will suffer from random errors because of the randomness of cloud movements. Sometimes the clouds block sunlight. E) Your measurements will suffer from systematic errors because they will never quite match the true temperature. F) Your measurements will suffer from a decrease in precision because at the same time of day tomorrow the amount…arrow_forwardThe amount of radiant energy emitted by a surface is given by q = ɛ0 AT+ where q represents the rate of thermal energy (per unit time) emitted by the surface in watts; e = the emissivity of the surface 0<ɛ<1 and is unitless o = Stefan-Boltzman constant (o = 5.67×10% ) A represents the area of the surface in m² Ty = surface temperature of the object expressed in kelvin What are the appropriate units for o if the equation is to be homogeneous in units?arrow_forwardA patient has an illness that typically lasts about 24 hours. The temperature, T, in degrees Fahrenheit, of the patient t hours after the illness begins is given by: T(t) = -0.012t² +0.3t +98.7. Use your calculator to graph the function and answer the following questions. Round all answers to 1 decimal place. When does the patient's temperature reach it maximum value? Answer: After hours What is the patient's maximum temperature during the illness? Answer:arrow_forward
- University Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice UniversityPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning