why should objects never be weighed while still hot

Which object will weigh about a kilogram? => Figure 2 or Figure 1 or both Figure 1 and Figure 2 or None of the above..

An object weighing 120 lb on Earth would weigh only 20 lb on Moon. How much would Jessica (78 lb on Earth) weigh on Moon? => 33 lb or 13 lb or 23 lb or 43 lb..

Manufacture of soap by the hot process involves the following step..

Raw dry rubber is heated with sulphur (5%-8% based on the requirement), zinc oxide (a filler, 5%) and accelerator (0.5% -1%) at 400-440K for about half an hour. As the sulphur quantity increases, the rubber becomes tougher. 50% sulphur gives ebonite (vulcanite) . An accelerator containing nitroge..

Which of these statements is true about the weight of the objects shown? => I don′t know. or The pineapple weighs more than the crayon. or The crayon weighs more than the pineapple. or The pineapple weighs the same as the crayon...

Identify the statement that is true about the weight of the objects shown. => I don′t know. or The crayon weighs more than the can. or The can weighs the same as the crayon. or The can weighs more than the crayon...

Identify the statement that is true about the weight of the objects shown. => The telephone weighs the same as the key. or I don′t know. or The telephone weighs more than the key. or The key weighs more than the telephone...

Which of the given objects has the maximum temperature? => a cup of hot tea or an ice cube or a candy or an ice cream..

Biodiversity is not uniformly distributed across the geographical regions of the earth. Norma Myers developed the hot spots concept in 1988 to designate priority areas for in-situ conservation. The hot spots are the richest and the most threatened reservoirs of plant and animal ..

Ethanol loses hydrogen and gives acetaldehyde in the presence of hot reduced copper at 570K...