Explanation
Let final temprature of water bc θ heat taken = Heat given 110 × 1( θ ‒ 10) + 10 (θ ‒ 10) = 220 × 1 (70 ‒ θ) ⇒ θ = 48.8oC ≈ 50oC
∆θ = 0.0023h = 0.0023 × 100 = 0.23oC
Initially ice will absorb heat to rise its temprature to 00C then its melting takes place. If mi = Initial mass of ice mi-1 = Mass of ice that melts and mw = Initial mass of water By low of mixture Heat gained by ice = Heat lost by water ⇒ mi × c ×(20) + mi + L = mwCw (20) ⇒ 2 × 0.5 (20) + mi × 80 = 5 ×1 × 20 ⇒ mi-7 = 1kg,So final mass water Initial mass of water + mass of ice that melts = 5 + 1 = 6 kg
Density of water is maximum at 40 C and is less on either side of this temprature.
With rise in pressure melting point of ice decreases also ice contracts on melting.
Celsius scale was the first temprature scale and fahrenheit is the smallest unit measuring temprature.
Melting is associated with increasing of internal energy without change in temprature in view of the reason being correct the amount of heat absorbed or given out during change of state is expressed where m is the mass of the substances and L is the latent heat of the substance.
The potential energy of water molecules is more. The heat given to melt the ice at 00C used up in increasing the potentical energy of water molecules formed at 00 C
Water has maximum density at 40 C on heating above 40 C or cooling below 40C density of water decreases and its volume increases.Therefore water overflows in both the cases.
Because film tries to cover minimum surface area.
The cohesive force is the force of attraction between the molecules of same substance.
Sphere has the minimum surface area for the given volume of the liquid.
Surface energy of combined drop will be lowered, so excess surface energy will raise the temperature of the drop.
Because energy is liberated
Angle of contact is acute
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