Tag: science & technology

Carburetors are responsible for atomizing liquid fuel in petrol engines by mixing it with air in the correct ratio before combustion. The carburetor uses venturi effect to break fuel into tiny droplets, creating a combustible mixture. Clutch is for transmission engagement, fuel injectors perform similar function in modern engines but carburetors were the standard in older petrol engines, and engine cylinder is where combustion happens.

Superchargers are forced induction systems that mechanically compress intake air and force it through the engine valves at higher pressure, increasing the air flow rate into the combustion chamber. This allows more oxygen to be available for combustion, resulting in increased power output. Carburetors mix fuel and air, fuel injectors deliver fuel, and spark plugs ignite the mixture.

Engines are classified as internal combustion (energy generated within the engine, like petrol/diesel engines) or external combustion (energy generated externally, like steam engines). Atmospheric is not a standard classification category for engines.

Diesel engines have higher thermal efficiency than petrol engines due to higher compression ratios and leaner air-fuel mixtures. Diesel engines typically achieve 40-45% thermal efficiency compared to 30-35% for petrol engines. This is why diesel vehicles often have better fuel economy.

Table sugar (sucrose) is a disaccharide composed of glucose and fructose. Fructose is fruit sugar, galactose is found in milk, and glucose is blood sugar.

Caffeine is the primary stimulant in coffee, tea, and cola drinks. Theobromine is found in chocolate, theophylline is a minor compound in tea, and sucrose is table sugar.

Sodium bicarbonate is baking soda - pure sodium bicarbonate used as a leavening agent. Baking powder contains baking soda plus cream of tartar and starch. Alum is a different compound, and cream of tartar is an acidic ingredient.

Tomatoes get their red color from lycopene, a carotenoid pigment. Beta carotene gives orange color (carrots), fructose is a sugar, and limonene provides citrus scent (lemons/oranges).

Leafy vegetables get their green color from chlorophyll, the pigment responsible for photosynthesis. Carotene provides orange pigment, mitochondria are organelles, and xanthophylls are yellow pigments.