At the beach, you can get a sunburn while under the shade of an umbrella. Explain the statement?

Q: What is vulnerabilty of security guards during heat waves? What  problems they might face during…

A: Heat is just energy in transit. When it is not moving it is thermal energy. It is that heat flows…

Q: What is vulnerabilty of security guards during heat waves? What problem they might face during heat…

A: Heat is just energy in transit. Flow of energy thermal is heat. It increases temperature. It flows…

Q: When you step from the shade into the sunlight, the Sun’s heat is as evident as the heat from hot…

A: Radius of sun (Rsun) = 6.96×108 mDistance between moon and earth (DME) = 3.84×108 m

Q: Water vapor is an invisible gas. How can an increase in relative humidity affect visibility?

A: Water vapour is the gaseous condition of H2O that is imperceptible to the naked eye. Clouds are…

Q: Standing in front of a fire, we can sense both its heat and its light. How are the light and heat…

A: Standing in front of a fire, we can sense both its heat and its light.  The light and heat radiated…

Q: Blackbody radiation is from a body that (a) does not emit radiation in the visible. (b) is black (c)…

A: Black-body radiation is from the body that absorb and then emits all the radiation falling on it.

Q: Since energy is radiated by all objects why can't we see them in the dark? From the rules that a…

A:

Q: A glass louvre pane 0.4 cm thick has an area of 2x10cm. On a very cold day the temperature…

A: The expression for the required rate of heat flow,

Q: Consider the 5-m * 5-m * 5-m cubical furnace shown in Fig. 21–47, whose surfaces closely approximate…

A: Consider the diagram for the given furnace and its radiation network.

Q: The nature of surfaces affects the absorption and the reflection of radiation. Assume that you are…

A: A good absorber will always be a good emitter.  Absorbvity of dark colours are always higher than…

Q: Consider two black bodies at temperatures T1 and T2 (T1 > T2) having same surface area (A), are…

A: The rate of radiant heat transfer from a surface is Er = eσAT4then the rate of heat transfer from…

Q: Some environmentally conscious people build their homes in the shape of a dome. Why is less heat…

A: Some people build their homes in the shape of a dome.

Q: What is the average energy contained in a 1.00 m3volume near the Earth’s surface due to radiant…

A: The expression for energy density stored in electric field as, u=12ε0E02 The equation for the…

Q: Why is white wash sometimes applied to the glass of florists greenhouses in the summer?

A: A greenhouse traps heat inside it. Sunlight entering through the glass gets reflected inside the…

Q: Assume the person lying flat on the beach and the rate of energy absorption from the sun is 500 W.…

A: Write the expression for rate of heat energy absorbed by the person

Q: s heat and light considered as a matter? Why? Why not

A: Heat is a form of energy. It is felt when there is difference in temperature of two bodies. Light is…

Q: After filling your gas tank to the top and parking your car in direct hot sunlight, why does the…

A: The molecules are free and widely spreading an expanded gas. So, its density is less as compared to…

Q: When watching a circus during the day in a large, dark-colored tent, you sense significant heat…

A:

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: When I step out of the shower, what makes the tile floor so much colder than the bathroom mat?

A: Air is a better insulator. The tiles transfer heat more than the mat, which means that the floor…

Q: The inner and outer glasses of a 4-ft * 4-ft double- pane window are at 60°F and 48°F, respectively.…

A: Write the given values, determine the average temperature, and also determine the heat transfer…

Q: Why do we wear white or light coloured clothes in summer and dark coloured clothes in winter?

A: White or light coloured clothes reflects light, which is reflects heat. So it helps to possess our…

Q: Consider a person sitting nude sun is absorbed by the person a the individual's skin temperatu…

A: Given:- On a sunny day, The visible radiation energy from the sun is absorbed by the person at a…

Q: at beach, you can get a sunburn while under the shade of an umbrella.What is your explanation?

A: Despite of being under the shade or umbrella, one can get the sunburns at the beach because…

Q: Why is the sky darker blue when you are at high altitudes?

A: The blue wavelength of sunlight are preferentially scattered by the Earth’s atmosphere. So generally…

Q: 19. Saniya lives in a cold climate. In the winter, her attic gets extremely cold. She has decided to…

A: We know that the winter is the coldest season of the year in polar.

Q: What do you notice when you get into a car that has been sitting in the Sun for a while?

A: the inside of the car will warm because radiation is coming in but not much is going back out.

Q: 0.863). It has a temperature of 67.0 °C. The new owner of the house paints the radiator a lighter…

A:

Q: When watching a daytime circus in a large, dark-colored tent, you sense significant heat transfer…

A: Heat transfer method of radiation:   A black body is a good absorber and a good radiator.   During…

Q: An object emits 30 Watts of power. If it were a perfect black body, other things are being equal, it…

A: Let the intensity of the radiation of an object is denoted by I, ε denotes the emissivity of the…

Q: Why will clouds tend to form above either a flat or a mountainous island in the middle of the ocean?…

A:

Q: A conductor transfers heat of 1500 J across its length of 20cm in 6 seconds. Given that its…

A:

Q: On a cold day, after you scraped your windshield and g condensation on the inside of the windshield.…

A: Given:- On a cold day, after you scraped your windshield and get into your car, you…

Q: Why are thermometers that are used in weather stations shielded from the sunshine? What does a…

A: When thermometer is exposed to sunshine, there will be an increase in the temperature reading due to…

Q: Water at the base of a waterfall is slightly warmer than at the top. Why?

A:

Q: When you step inside a warm ski lodge on a cold day, you find your eyeglasses fog. Why does this…

A: Due to condensation fog can be found on eyeglass.

Q: Heat is defined as energy that is moving from one place to another as a consequence of a temperature…

A: The internal energy may be increased by transferring energy to the object from a higher temperature…

Q: What is the reason for the widespread use of fins on surfaces?

A: The phenomenon through which heat transfer from one body to another due to temperature difference is…

Q: The bulb of one thermometer is spherical while that of other is cylindrical. Both have equal amount…

A: The surface area of the cylindrical bulb will be more compared to the spherical bulb. Both the bulbs…

Q: Why is the front surface of a thermometer curved as shown?

A: The front surface of a thermometer is curved as it serves a magnifying effect due to the refraction…

Ideal Gas Law

Ideal gas law states that the product of pressure and volume of a gas directly varies with the product of the number of moles, the universal gas constant, and the temperature of the gas.