When a glass rod is rubbed with a piece of silk cloth
(A) Both cloth and the rod acquire positive charge
(B) Rod becomes positively charged while the cloth has a negative charge
(C) Rod becomes negatively charged while the cloth has a positive charge
(D) Both cloth and the rod acquire negative charge
The diagram shows a boiling tube filled with water. There is an ice cube wrapped with wire gauze at the bottom of the tube, and the water at the top of the tube is heated as shown. When water at the top of the tube is boiling, the ice cube remains frozen.
What can you infer from this experiment ?
(A) Heat gain causes matter to expand
(B) Heat loss causes matter to contract
(C) Ice cubes melt at 0°C
(D) Water is a poor conductor of heat
can you pease explain thi question?
Arrange the following planets in increasing order of time required to complete one revolution around Sun. (i) Earth (iii) Mars (iv) Jupiter
(A) (i), (ii), (iii), (iv)
(B) (i), (iii), (iv), (ii)
(C) (iv), (iii), (ii), (i)
(D) (ii), (iii), (i), (iv)
Why are there only 3 planets given?
Joy wants to save ₹ 50 to buy a pair of roller blades. He plans to save ₹ 2 in the first month, ₹ 4 in the second month, ₹ 6 in the third month, and ₹ 8 in the fourth month.
If Joy continues this savings pattern, how many months will Joy take to save ₹ 50 ?