6. For solar collectors, what combination of surface chara a. High absorptivity and high reflectivity b. High absorptivity and high emissivity c. High emissivity and low absorptivity d High absorptivity and low emissivity

Q: 2. Calculate the melting point of ice under a pressure of 10 MPa in Kelv density of ice under these…

A: GivenP=10 MPa

Q: a) Cool roofs use highly effective materials to reflect light and absorb less heat from sunlight,…

A: Note: We’ll answer the first question since the exact one wasn’t specified. Please submit a new…

Q: Which portion of the electromagnetic spectrum below has the highest frequency? a. gamma rays b. UV…

A: Answer The electromagnetic waves contains 7 region and the frequency changes according to the…

Q: 1. What can you observe from the picture below? Explain in detail. Penetrates Earth's Atmosphere?…

A:

Q: 2. A 60-W incandescent light bulb runs continuously for 100 days. Use 3 significant digits in your…

A: Power = 60 W time = 100 days

Q: gth can be used to determine the frequency, but frequency cannot be used to determine wavelength.…

A: Given:-6 What is the relationship between wavelength and frequency for electromagnetic radiation?…

Q: The faster the molecules move, the lower the temperature. TRUE / FALSE 5. Materials of low thermal…

A:

Q: How does a microwave differ from a gamma ray? A.Gamma rays have lower frequencies than microwaves…

A: The increasing order of the wavelength of the electro magnetic spectrum is  Gamma rays X rays  UV…

Q: 6) A vertical plate 60 cm high and 30 cm wide is maintained at a temperature of 95°C in a room where…

A:

Q: hich of these has a higher frequency than visible light? a. radio wave b. microwave c. infrared…

A: The electromagnetic (EM) spectrum is a range of all possible frequencies of electromagnetic…

Q: 1. Suppose that the temperature drops by 3°C overnight. How much of a change is that in Kelvin? Now,…

A:

Q: a. emits green light. b. absorbs green light. C. transmits green light. d. reflects green light.

A: d) Apple is green because it REFLECTS GREEN LIGHTS ( and absorb all other lights)

Q: What is the absolute temperature reading in Kelvin(K), if the arbitrary temperature °C reading is…

A:

Q: What is zeroth law of thermal dynamics? How to confirm the thermal equivalent state? Try to explain…

A: Zeroth Law of thermal dynamics or thermodynamics states that " Heat flow will take place from one…

Q: The sun is shining (800 w/m2) on two cars, each with 4m2 surface area facing the sun. One is painted…

A:

Q: 3. What is the frequency of a photon that has a wavelength of 2.5 x 107 m?

A:

Q: The colorful display of lights in the upper atmosphere seen in higher and lower latitudes are called…

A: Ques: The colorful display of lights in the upper atmosphere seen in higher and lower latitudes…

Q: form of light that the human eye is able to detect

A: (B)  Visible light Human can see only visible light

Q: In class we found an expression for the 'garden hose angle', y, and showed it had a typical value…

A: Given, There is an expression for the graden hose angle ψ

Q: At midday when a black grain storage facility is directly under the Sun, it receives 1,025 W of…

A: Power = 1025 W emissivity = 1 Area = 1 m2

Q: at is specific heat? How efficient an object is at absorbing light. How efficient an object is at…

A: Let us consider we have a material of mass (m).Now (Q) amount of heat energy is supplied to this…

Q: Ozone in Earth's upper atomsphere is most helpful in absorbing potentially damaging a. ultraviolet…

A: Ozone in Earth's upper atomosphere is most helpful in absorbing potentially damaging ultraviolet…

Q: 1. Draw any one diagram for solar cooker (Flat plate type)-Name all parts.

A:

Q: A 19 century lab technician is testing possible metals for bulb filaments. A tantalum filament with…

A: Given: In this question, the given details are, A 19 century lab technician is testing possible…

Q: What are Radiations? Explain How heat is transfer in the form of radiation.

A: What are Radiations? Radiations are electromagnetic(EM) waves. These are electric and magnetic waves…

Q: 1. A book will heat up if placed in the sunlight. Why is this not an example of conduction? Explain…

A: A book will heat if it is placed in the sunlight. We have been asked that why this example is not…

Q: A meteorite enters the Earth's atmosphere at 10 times the speed of sound.  If all of the kinetic…

A:

Q: 10. What is the approximate speed of light (EM radiation)? a. 1 billion feet per second b. 1…

A: The speed of light is about 300000000 m/s or 3×108 m/s.

Q: 40. UV light is invisible to the human eye, unless we use special sensors. Given the range of…

A:

Q: 1. Describe briefly the principles of condensers.

A: Solution attached in the photo

Q: The Intensity of the radiation incident at the earth from the sun is 1380Wm^-2. If the distance from…

A: 1. A.  Given data IE=1380 W/m2rE=1.5×1011 m

Q: Q1. When steel plate and wooden plate of the same mass are placed under the sunlight, which plate…

A: A multiple question is given. Answering for the first question. Given: A steel and wooden plate is…

Q: Thickness of the ozone layer The thickness of the ozone layer can be estimated using the formula In…

A: The thickness of the ozone layer is given by the formula ln I0-ln I=kx sec θln I0I=kx sec θI0I=ekx…

Q: - The ratio between electric current produced and input light energy is called…

A: (a) Photovoltaic effect: When a photovoltaic cell is exposed to sunlight, the photovoltaic effect…

Q: 8. Which portion of the electromagnetic spectrum below has the longest wavelength? a. gamma rays b.…

A: We have five EM waves that are given to us from the electromagnetic spectrum : Gamma rays,…

Q: If the wavelength of light increases due to a Doppler Shift, what happens to the light's frequency?…

A: Answer: (a) It decreases

Q: An observer sees a lightening flash from a distant thunderstorm and 12 seconds later hears the…

A:

Q: Heat flows from one body to another when they have O a. different heat contents. O b. different…

A:

Q: 1. Determine the wavelength, in miles, if the period of the signal is 500µs. 2. The maximum peaks…

A: