Question
In which form is the supplied heat energy stored during
change in temperature of substance?Solution
Temperature is used as a measure for heat in an object by measuring the amount of kinetic energy in the molecules that make up the object. It is a measure of the average kinetic energy of the random molecular motion. Heat is a form of energy that can be transferred from the heat source to the molecules, and it can also change its form from heat to movement.
Ajay buys an old desktop for Rs. 6200 and spends Rs. 400 on its repairs. If he sells the desktop for Rs. 7000, his gain percent is
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A shopkeeper marked an article ‘A’ 60% above the cost price and sold it for Rs. 1008 after giving a certain discount while he sold an article ‘B�...
The marked price of an article is Rs. 22,500, and it is sold at a 25% discount. The profit made on selling the article is Rs. 1,950. What is the cost pr...
Oil equal to 20% of the weight of ground nut is extracted in a mill. The matter left after extraction is sold as cattle feed at the rate of Rs 12.5/kg. ...
A shopkeeper first allows a discount of 20% on a certain variety of cloth and then further gives a discount if 15% to the persons holding a shareholder...
The combined cost price of two items, A and B, is ₹1,120. Item A is marked up by 25%, and item B by 40%. Both are sold with a 10% discount on their ma...
A shopkeeper sold an article for Rs. 600 after offering a discount of 40%. If he earned a profit of 50%, then find the ratio of cost price to the marked...
Anjali sold 50% of her apples and was left with 25 less than 60% of what she originally had. Find the number of apples sold by Anjali.
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