2. The 350m wavelength signals from the radio station will be received by the listener as two rays. One ray takes a straight line path from transmitter to the receiver and the other ray by being reflected by the ionized gas particles in the atmosphere at a distance half way between the transmitter and the listener. There is no phase change occurs due to reflection. Find the minimum height of the layer of the atmoshpheric gases which can create a destructive interference between the two rays above mentioned.

Q: soils within

A: The correct answer for question 20 is option A i.e. partially saturated. The capillary zone is the s...

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A: Forest is a very precious resource provided by nature. It is a shelter for many organisms and these ...

Q: How can a disaster put a risk to people's health?

A: INTRODUCTION: A Disaster is an event that causes serious disruption and harms the population that re...

Q: Give the water balance equation and explain why changes in storage, S, is cancelled over a long peri...

A:  Water Balance Equation is an equation that depicts the water flow in and out of a basin. It is used...

Q: Thinking Analytically What is the wavelength of a typical storm surge?

A: Storm surges are large waves that strike the coast formed by the low-pressure system in the ocean fo...

Q: please answer question #6

A: The Tropic of Capricorn is a parallel of latitude 23.5o south of the equator. During December solsti...

Q: How deep can a person dive (without a submarine, that is)?

A: Diving is generally referred as water sports in which people use to dive in deep ocean water .  When...

Q: What are the possible processes involved in the formation of soil profile A? 0.5

A: Soils are the result of weathering action of surface rocks. This soil usually constitutes five horiz...

Q: Is plankton a natural or artificial category?

A: 71% of Earth's surface is covered with ocean. Therefore aquatic ecosystem or more specifically the m...

Q: What are the two kinds of seismic waves? Which causes most of the damage in an earthquake? Which are...

A: The two kinds of seismic waves are: The body waves: they travel within the interior of earth and in...

Q: How much can sea level drop during an Ice Age? What effect does this have on ocean-water temperature...

A: Global sea level fluctuates over the geological ages. This fluctuation directly depends on the Tempe...

Q: Demonstrate and explain how ridges in a catchment are important in determining the watercourse?

A: Watershed is an area of land which drain the water from rainfall, snow melt and spring to a specific...

Q: Give at least two keystone species, what their contribution to the environment is, and what would ha...

A:  Keystone species are organism which defines entire ecosystem, without such species the ecosystem wo...

Q: In petrology, modal analyses of rocks is important for determining the mineralogical composition of ...

A: The digital image analysis by pixel counting helps them to calculate the modal calculation of a part...

Q: What is the role of conservation in reducing soil salinity and sodicity?

A: Saline soils have excess amounts of soluble salt where as sodic soils have excess amounts of exchang...

Q: Question 10 of 10 What new question occurred to scientists after they discovered that the ocean floo...

A: Earlier it was considered that the ocean bottom was a featureless periplanar surface with vast stret...

Q: Number 1 to 3

A: Disaster is a sudden disruption of normal life causing severe damage to life and property to an exte...

Q: 7) Please answer the question in the picture

A: fault are structures which has discontinuity or fracture along a rock mass where a movement have tak...

Q: 5. What is the rate of movement along the fault in the past 10,000 years? This can be determined by ...

A: fault are structures which has discontinuity or fracture along a rock mass where a movement have tak...

Q: How are wind waves formed? What’s a fetch?

A: Firstly, let us discuss something about wind waves, Wind Waves: Waves that are initiated by winds. 

Q: How old is Earth? When did life arise? On what is that estimate based? How did the moon form?

A: Earth is the third planet in the solar system. It is the only planet known so far that can sustain l...

Q: Why are most of the world’s deserts located along the Horse Latitudes?

A: Horse latitudes are tropical and subtropical latitudes , where sky is sunny , temperature is high , ...

Q: What is the nature of “truth” in science? Can anything be proven absolutely true?

A: Science is a is a knowledgeable and applied activity which consist of systematic study of behaviour ...

Q: 1) The Caribbean is surrounded by all different types of plate boundaries.  the green dots on the m...

A: From observing the map of recent earthquakes, the epicentre of the particularly large earthquake occ...

Q: What tidal patterns are observed on the world’s coasts?

A: Tides are very long periodic waves that revolves around the center of mass . The reason of their dev...

Q: Why are sunspots cooler than the surrounding surface?

A: Sunspot are temporary phenomena on sun photosphere or surface which are darker in appearance than th...

Q: Given what you know about GMO crops, identify some of the costs and benefits associated with them. W...

A: Genetically Modified Organisms (GMO) are the organisms, microorganisms, plants, or animals in which ...

Q: How much did global surface temperature rise in the 20th century? How much is temperature projected ...

A: Global surface temperature is the annual average of the temperature of the planet that is taken by t...

Q: What might cause waves approaching a shore at an angle to bend to break nearly parallel with the sho...

A: The Earth is a terrestrial planet, which means it has a rocky surface that is primarily consisted of...

Q: The amount of neutrinos measured from Earth were   a. half the amount predicted.   b. one-th...

A: The correct answer will be option b i.e. one third of the amount predicted.

Q: What explanation can you give for the bend in the Hawaiian-Emperor Chain?

A: Tectonic plates are piece of earth crust and upper mantle which together are called as lithosphere. ...

Q: What do weather forecasters seek to achieve

A: The Earth is made up of four spheres known as lithosphere, atmosphere, hydrosphere, and biosphere. A...

Q: Why should there be a tidal bulge on the side of Earth away from the moon?

A: A tidal bulge is a strain that is produced by the celestial-body that undergoes gravitational attrac...

Q: Will a typical wildfire burn faster upslope or downslope? Why?

A: Fire is the rapid oxidation of any material. It is an exothermic process of combustion, in which hea...

Q: Nuclear power plants on Earth generate energy through   a. nuclear fission.   b. nuclear fus...

A: Option a i.e. nuclear fission is the correct answer. The nuclear power plants on earth generate ener...

Q: In the current discussions about global warming, does weather change sometimes get confused with cli...

A: Some people miss differentiate between the terms climate and weather, and perhaps this is linked to ...

Q: Why does it rain?

A: Rain:- It is liquid water droplets which comes down to the earth in the form of precipitation. Rain ...

Q: What is taiga and where is it found? Why might taiga be slower to recover from logging than southern...

A: The forests that are situated at higher latitudes that are moist in nature are called Taiga. These f...

Q: capacity then all rainfall should run over the surface.

A: The above statement is true.

Q: Please solve it quickly

A: The hardness of the water is due to the presence of calcium and magnesium elements.  Ferrous iron so...

Q: Where are tornadoes most likely to form in a hurricane?

A: A tornado is the rotating air column vigorously from a low-pressure disturbance with a vertical axis...

Q: What are the mechanisms by which conservation tillage promotes soil resilience

A: Soil is a mixture of mineral water, organic matter and living organism and decaying matter of living...

Q: Advantages and Disadvantages of Soil and Water Conservation Measure

A: Conservation is something we use to define as the method and technique that protects natural resourc...

Q: Table 1. Important chemical and physical properties of primary and secondary minerals. Minerals Chem...

A: Calcite: Chemical formula: CaCO3 Reaction to HCl: + Colour: Colourless or white, grey, red. Streak: ...

Q: On which landmasses is the climate likely to have been warmer in Late Cambrian time than it is today...

A: Cambrian Period was one of the major periods which witnessed several changes. The period had an even...

Q: Describe how the Babcock model explains the magnetic cycle.

A: Basics of the solar magnetic cycle is explained by the Babcock model. It describes a mechanism that ...

Q: What can an individual do to minimize his or her impact on the ocean and atmosphere?

A: The environment is all the living and non-living organisms in an area. This term is often applied to...

Q: Living things are classified into groups based on similar characteristics. Which of the Following be...

A: The classification of organisms into different groups in order to study all the different characteri...

Q: Conifer and deciduous forest Which forest has a more acidic soil?  What would explain this differenc...

A: Forests are the biggest part of vegetation on the earth. They contribute to most of vegetative cover...

Q: List several externalized costs of power production with coal.

A: External costs: They are usually unpriced costs, as they are most of the time side effects the produ...