Which of the following is the characteristic of a black body? a) A perfect absorber but an imperfect radiator b) A perfect radiator but an imperfect absorber c) A perfect radiator and a perfect absorber d) A perfect conductor
Q: A cylinder of diameter 1.0 cm at 300C is to be slide into a hole on a steel plate. The hole has a…
A: diameter of the hole is a linear dimension of the object, which when subjected to heat leads to…
Q: A spherical air bubble originates from a scuba diiver at a depth of 28.0 m At a depth of 14m it has…
A: initial depth from where the bubble begins to rise = 28 m new depth of bubble = 14 mdiameter of…
Q: An object with a temperature of 200˚C is placed into an enclosure so that it is completely…
A: Every object whose temperature is above absolute zero, emits electromagnetic radiation. A Blackbody…
Q: Nuclear fusion - the energy source of the Sun, hydrogen bombs, and fusion reactors - occurs much…
A: Given average kinetic energy of the atoms is K.E.= 5.65 × 10-14 J
Q: Law of Cooling erature, u, of a heated object at a given time t can be modeled by the equation u(t)…
A: From first situation we can find value of k and putting in second situation we can find the required…
Q: During an all-night cram session, a student heats up a 0.626 liter (0.626 x 10 3 m³) glass (Pyrex)…
A:
Q: (a) If 50 g ice dice at 0°C is dropped into 1.0 kg of water that was once firstly at 80°C. What is…
A:
Q: what is the ratio of the
A: Mass of object 1, =m/2 Mass of object 2=m Specific heat of object 1, =2S Specific heat of object…
Q: A solid container with a volume of 150 L at an initial pressure of 2 MPa was filled with a kilogram…
A: volume = 150 Lpressure P1 = 2MPatemp T2 = 40+273 = 313 KFINDP2 , T1
Q: A solid copper disc and a copper ring have the same outer diameter at room temperature. They are…
A: Ring and disk has same diameter. Both are made up of same material When temperate increases linear…
Q: Two bodies A and B are of same mass and same amount of heat is given to both of them. If the…
A: Given: Two bodies A and B having same mass and same amount of energy. Definition of Specific Heat.…
Q: a) Write down equations for the linear and volume expansion of a body for small changes in…
A: Linear and volumetric expansion:
Q: QI Assuming a filament in a 130 W light bulb acts like a perfect blackbody (e- 1), what is the…
A:
Q: a) Calculate the work in J obtained from the reversible expansion of 0.2 mol of krypton from 4.25 L…
A: Work obtained in the reversible expansion of the gas at constant temperature is given by Where n =…
Q: A shower is 11.0 m from the hot water heater. The copper pipe has a radius of 1.11 cm and a…
A: From the heat loss formula, θt=kAT2-T1dx Where, θ/t be defined as the rate of heat loss. k be…
Q: a) If you want to keep you cup of coffee as warm as possible when you drink it, should you add the…
A: a) Here, you should add the cold cream right after you pour the coffee. The reason is the…
Q: The intensity of solar radiation reaching the Earth is 1,340 W/m2. If the sun has a radius of 7.000…
A: This question is based on thermal properties of matter topic. We need to know about Stephan…
Q: How much power is radiated from each panel? Assume that the panels are in the shade so that the…
A:
Q: A steel bar and a copper bar have the same length of 1.400 m at -10.00 ∘C. What is the difference…
A: Initial length of the bars is L = 1.4m Initial temperature of bars Ti = -10°C, Final temperature of…
Q: As a cook you hold place a metal pan(with a wooden handle attached to it) on top a hot flame and…
A: Given As a cook you hold place a metal pan(with a wooden handle attached to it) on top a hot flame…
Q: Suppose small, spherical pieces of pasta are floating in a column of water at a temperature of 298…
A:
Q: A 100 liter tank contains a mixture of saturated liquid water and saturated steam at 370 °C. a) Find…
A:
Q: The energy reaching Earth from the Sun at the top of the atmosphere is 1.36 x10^3 W/m2 , called the…
A: According to Stefan Boltzmann lawE=eσT4WhereE=the amount of radiation emitted per unit time per…
Q: The temperature of an ideal gas is directly proportional to the average kinetic energy of its…
A: The average kinetic energy of an ideal gas molecules which is as result of the motion inside the…
Q: The Moon is Earth's only natural satellite. It has a mass of 7.34 × 1022 kg and is roughly spherical…
A: 7)A=4πr2e=0.9Let moon radius r=1737.4⋅103tQ=eσAT4tQ=σ(0.9)(4π⋅(1737.4⋅103)2)(26)4tQ=8.84⋅1011≈e)…
Q: A spherical infrared heater of radius 5.85 cm and an emissivity of 0.71 radiates 0.44 kW of power.…
A: Given Radius r=5.85*10-2m emmisivity e=0.71 power P=0.44*103W Stefan's constant σ=5.67x10-8 Wm-2K-4…
Q: The glowing filament in a lamp is radiating energy at a rate of 60 W. At the filament's temperature…
A:
Q: A steel aircraft carrier is 369.65 m le moving through the icy North Atlar temperature of 2°C. By…
A: Given value:- Length of steel aircraft,(L)=369.65 m ----(1) North Atlantic temperature,(T1)=2 0C…
Q: What is the rate of heat transfer by radiation from the skin of a person standing in a dark room…
A: Given that the value of ambient temperature and surface area and emissivity of skin and temperature…
Q: Suppose small, spherical pieces of pasta are floating in a column of water at a temperature of 298…
A: Particles in Perrin's experiment obey the Barometric equation. The barometric equation for the…
Q: courses / PHYS1211 / Lab Experiments / Experiment 3: Lab Report (Thermal Conductivity of Materials)…
A: As thermal conductivity of any material is its ability to conduct the heat through itself.
Q: How much thermal energy/heat is required to raise 2.3 kg of lead from 300°C to 1800°C? Table 1 p281…
A: Heat energy required to raise the temperature of a substance of mass m from T1 to T2 is given by,…
Q: A student in a lecture hall has 0.310 m^2 of skin (arms, hands, and head) exposed. The skin is at…
A:
Q: On a certain day, the temperature dropped from 480F to 170F in 6 hours. What is the temperature…
A:
Q: A wire lengthens 4% due to thermal expansion when heated from T. to T₁. If the wire were bent into…
A:
Q: How much heat does it take to vaporize 800 g of liquid nitrogen (N 2)?
A: The expression for the heat to vaporize is,
Which of the following is the characteristic of a black body?
a) A perfect absorber but an imperfect radiator
b) A perfect radiator but an imperfect absorber
c) A perfect radiator and a perfect absorber
d) A perfect conductor
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- Please help! A student in a lecture hall has 0.310 m^2 of skin (arms, hands, and head) exposed. The skin is at 34.0°C and has an emissivity of 0.970. The temperature of the room is 20.2°C (air, walls, ceiling, and floor all at the same temperature). The Stefan-Boltzmann constant is 5.670 x 10-8 w/ (m2. k4 ). a) at what rate does the skin emit thermal radiation? b) at what rate does the skin absorb thermal radiation? THANK UPlease only type answerSuppose you perform an experiment using the Celsius temperature scale and find a change in temperature of 5°C. Then you perform the same experiment again now using the Kelvin temperature and you have a temperature change of 5 K, you can state that: a) the kelvin temperature change is greater. b) these temperature changes cannot be compared with each other. c) the change in the Celsius temperature scale is greater. d) both temperature changes are equal.
- A uniform free rectangular steel plate is heated from 273 to 373 kelvin. The initial area of the plate is 15 sq. cm. What is the shift of the centre of mass? a)0 cm b) 1 cm c) 2 cm d) 3 cmThe temperature of a body can be negative on the Kelvin scale. a) True b) FalseA chocolate bar has 225Cal. Charlie is locked in a deserted chocolate factory and needs to heat 2.00L of water for his dinner. He plans on burning chocolate bars to accomplish this. a) How many kJ of energy are needed to heat the water from 25.0C to 100.0C? __ kJ b) What fraction of a chocolate bar would be needed to heat the water? __% Answer all parts A and B.
- The volume of a gas at 20°C is 100cm3 at normal pressure. If it is heated to 100°C, its volume becomes 125cm3 at the same pressure, then volume coefficients of the gas (at normal pressure) is? a) 0.0033/°C b) 0.0025/°C c) 0.0030/°C d) 0.0021/°CTwo bodies in thermal equilibrium can have different pressures. True or False? a) True b) FalseAn air bubble has a volume of 1.70 cm3 when it is released by a submarine 115 m below the surface of a lake. What is the volume of the bubble when it reaches the surface? Assume the temperature and the number of air molecules in the bubble remain constant during its ascent. ?cm3
- AL = a AT Activity 2 = BAT %3D Schmedrick takes his dune buggy to the gas station and fills it the very brim. His tank is a steel cylinder of radius 23 cm and height 45 cm (big enough to hold about 20 gallons). He burns a liter of gas getting to the beach, where both the tank and the gas heat up by 20 °C. Both the tank and the gas expand. For steel a = 1.1· 10$/°C. For gasoline B = 9.6- 104/°C. Does the tank overflow? 1. Use the linear expansion formula to calculate the increase in radius of the tank: up to Hints. 5.06 · 103 cm 2. Use the linear expansion formula to calculate the increase in height of the tank: 9.9 ·103 cm 3. For a cylinder, V = ar?h. Calculate the increase in volume of the tank: 4. Calculate the volume of gasoline at the beach before expansion. (1 cm³ = 1 mL): 73 785.613 cm³ 5. Use the volume expansion formula to calculate the increase in volume of the gasoline: 1416.684 cm³ 6. Conclusion: Schmed will be kicked out for spilling gas at the beach! %3D 49.3694 cm³e) Given the following data collected about the velocity of the red light (650 nm) and green light (510 nm) on air. VredT-o'c) = Vgreenr-o°c) = Vred(r-1'c)=Vgreenr=11°C)| Vred-45°c) = Vgreen (-45'°C) (T=0 (T=11°C) What are your conclusions comparing the effect of the temperature and frequency on sound and light velocities? Justify your answer based on the data presented and the physics of sound and light.A human body has a temperature of 30°C If its total surface area is 1.2 m2, what is the net rate of heat loss from the body by convection alone considering the surrounding temperature to be 24°C? Consider film coefficient to be h = 4.7 W/m2K.