Answer: ab + bc + ca (a - b + ab) + (b - c + bc) + (c - a + ac) = a - b + ab + b - c + bc + c - a + ac (a - b + ab) + (b - c + bc) + (c - a +... View Article
Answer: 0 (ab - bc) + (bc - ca) + (ca - ab) = ab - bc + bc - ca + ca - ab (ab - bc) + (bc - ca) + (ca - ab) = ab - ab - bc + bc - ca + ca (ab -... View Article
Answer: Air moves from a region of high air pressure to a region of low air pressure. Air always flows from high-pressure areas to low-pressure... View Article
Answer: All the stars are at the same distance from us - False Stars are celestial bodies that emit their own light and heat. Our sun is an... View Article
Answer: Ammonia is basic in nature. The chemical formula for ammonia is NH3. It is a colourless gas. It is made up of two elements: hydrogen... View Article
Answer: Air needs a medium to get transmitted. If we slowly remove the air inside the bottle. Sound will not be having medium to travel as it... View Article
Answer: The archer shoots an arrow by stretching the bowstring with muscular force. When the string is released, it reverts to its previous... View Article
Answer: (c) go up and then come back to the surface of the moon. Because the acceleration due to gravity on the moon is lower than on Earth, the... View Article
Answer: (d) chemical, heating, and magnetic effects. Electric Current is the rate of flow of electrons in a conductor. The SI Unit of electric... View Article
Answer: When an electric current passes through a conducting liquid, it gets decomposed into ions. The conducting solution has free ions... View Article
Answer: (a) charged An electroscope is a device that may be used to determine whether or not an object is charged. It is made up of two metallic... View Article
Answer: (a) 0.02 s We know that Frequency (f) = 1/ Time period Time period = 1/ Frequency Given parameter An object is vibrating at 50 hertz. 50... View Article
Answer: (iii) Both processes A and B are chemical changes Physical change - A substance is said to undergo a physical change when only the... View Article
Answer: True A thunderstorm is a storm with lightning and thunder. It’s produced by a cumulonimbus cloud, usually producing gusty winds,... View Article
Answer: The above solution may be neutral or basic in nature as both of them will not change the colour of the blue litmus paper. The litmus... View Article
Answer: (a) higher current is flowing through the circuit in setup A. Because solution A is a better conductor of electricity than solution B,... View Article
Answer: The bulb did not initially glow because one of the cells could not produce enough voltage to cause the current to glow the bulb. When a... View Article