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High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 megahertz (MHz). It is also known as the DECAMETER band or decameter WAVE as its wavelengths range from one to ten decameters (ten to one hundred meters).EXPLANATION:Hope it helps you...!!!

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se relation between acceleration, velocity and time to find the nature of the graph. The Velocity-time graph gives acceleration as slope. In non-uniform motion acceleration changes, eventually slope changes. The slope is either increasing or decreasing. While, in uniform motion, the acceleration REMAINS constant, thus slope remains the same.Complete solution:The velocity-time graph for a uniform accelerated motion is shown below.We know formula for acceleration is given by,We know formula for acceleration is given by,a=v/twhere, a: Accelerationa: Accelerationv: Velocitya: Accelerationv: Velocityt : TimeFrom the above equation, it can be understood that the slope calculated from the velocity-time graph gives acceleration. Thus, the velocity-time graph of a uniformly accelerated motion is a straight line graph INCLINING towards the time axis on the X-axis. If the body is moving with a positive constant acceleration then the graph slopes upward. In case, if the body is moving with negative constant acceleration then the graph slopes downward.Additional Information:If the acceleration of the body is zero then the slope of the graph will also be zero. Then, the graph will just be a straight HORIZONTAL line with zero slope. Such a motion is known as uniform motion with zero acceleration. The graph for zero acceleration is shown below.Note: Students must not CONFUSE between the nature of the graph for a uniform accelerated motion and non-uniform accelerated motion. The velocity-time graph for uniform accelerated motion is a straight line. Whereas, for non-uniform accelerated motion it gives a curved line. If we draw a DISTANCE versus time graph, it will show the same nature of graph for uniform motion and non-uniform motion as it is in velocity versus time graph.

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Fleming's right-hand RULE (for generators) shows the direction of induced current when a conductor ATTACHED to a circuit moves in a MAGNETIC FIELD. ... The current in the wire can have two possible directions. Fleming's right-hand rule GIVES which direction the current flows.

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We GET NATURAL RESOURCES from NATURE

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- Initial velocity = U = 15 ms-¹Acceleration = a = 10 ms-²Time taken = t = 5sNow, Using first EQUATION of motion we can find the final velocity,V = u + at v = 15 + 10 × 5 v = 65 ms-¹Again,we can solve the distance COVERED by using both second and third equation of motion. So using second equation,S = ut + 1/2 at²S = 15 × 5 + 1/2 × 10 × 5 × 5 S = 75 + 125 S = 200 m Using third equation,v² - u² = 2aS (v-u)(v+u) = 2(10)S [v² - u² = (v-u)(v+u) (65-15)(65+15) = 20S20S = 4000S = 200 m Hence,The final velocity = v = 65 ms-¹Distance covered = S = 200 m

The amount of water vapour present in the air is termed as humidity .The percentage of moisture present in the atmosphere as compared to its FULL capacity at a GIVEN temperature is known as the RELATIVE humidity. The VAPOR content of air is measured with devices known as hygrometers.

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gas changes into a LIQUID, it is called condensation.please MARK me BRAIN mark LIST

hmmm ,. but mai aapni SIS ko BAHUT payar karta hum. oo meri bahut help karti study mai jo nahi aata oohe BATATI mai bahut lucky hum , Explanation:In physiology, RESPIRATION is the movement of oxygen from the OUTSIDE environment to the cells within tissues, and the removal of carbon dioxide in the opposite direction

empty R.D bottle = 26.4 gmMass of R.D bottle + water = 38.4 gmMass of R.D bottle + liquid = 35.4 gmmass of only water = 38.4 -26.4 = 12 gmVolume of 1 G of water = 1 CM 3 ∴ VOLUME of 12 g of water = 12cm 3 MASS of only liquid = 35.4 - 26.4 = 9 gmVolume of the liquid = 12cm 3 ∴ Density of liquid = Vol.ofliquidMassofliquid = 12cm 3 9g =0.75g/cm 3 R.D of the liquid = DensityofwaterDensityofliquid = 1.00g/cm 3 0.75g/cm 3 =0.75

is a sticky film of bacteria that constantly FORMS on teeth. Bacteria in plaque produce acids after you eat or drink. These acids can destroy tooth enamel and cause CAVITIES and gingivitis (gum disease). Plaque can also develop under the gums on tooth roots and BREAK down the BONES that SUPPORT teeth.please mark me brain mark list

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A cryptocurrency, crypto-currency, or crypto is a binary data DESIGNED to work as a medium of EXCHANGE WHEREIN individual coin ownership records are stored in a ledger EXISTING in a form of a COMPUTERIZED .ello

is an explosion from the SURFACE of a white-dwarf star in a binary star system. ... A supernova is a violent STELLAR explosion that can shine as brightly as an entire galaxy of BILLIONS of normal stars. Astronomers divide supernovae into two groups.please mark me brain mark list

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he kinetic energy of a molecule is proportional to its temperature, EVAPORATION proceeds more QUICKLY at higher temperatures. As the faster-moving MOLECULES escape, the remaining molecules have lower average kinetic energy, and the temperature of the liquid decreases.please MARK me BRAIN mark list

yes it is faster for ka to gain acceleration than a loaded TRUCK whyExplanation:because of inertia as inertia opposes change in state of motionas inertia is directly proportional to mass so this MEANS more the mass,more inertia and more OPPOSITION to change In state of motion as loaded truck obviously has more mass then car so there is more opposition to acceleration or change in state of motionhope this help you please mark me as brainliest

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substance with particular chemical PROPERTIES INCLUDING turning litmus RED, NEUTRALIZING alkalis, and dissolving some METALS; typically, a corrosive or sour-tasting liquid of this kind

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Because there is water everywhere by which the water GETS hot and vaporised so that's why near the sea TEMPERATURE is low. Water HEATS and cools more slowly than land AREAS.

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as we KNOW force is inversely proportional to SQUARE of the DISTANCE. therefore NEW force = F/9

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ay tubeX-rays are generated VIA interactions of the ACCELERATED electrons with electrons of tungsten nuclei within the tube anode. There are two TYPES of X-ray generated: CHARACTERISTIC radiation and bremsstrahlung radiation.please mark me brain mark LIST

s DENSER than AIR

Asbestos is the answer.... Explanation:It is the TYPE of CEMENT sheet which is used to PROTECT BUILDINGS in hot CLIMATE...