A train is running with the speed of 72 kmph crosses a pole in 25 sec. In how much time it can cross a 160 m long platform?
Let the length of train be ‘x’ meter. => x = 25 x 72 x (5/18) = 500 m Time required to cross the platform = (500 + 160)/[72 x (5/18)] = 660/20 = 33 sec
Which of the following is an example of a colloidal solution?
Why is commercial nitric acid typically yellow or brown in color?
Which of the following statement is/are true?
I. Atomic radius increases in moving from left to right along a period.
II. Atomic size...
Which is the best fire-extinguisher?
Which of the following is an example of a heterogeneous mixture?
The process of converting a solid directly into its vapor is called:
The product of the equivalent weight and valency of an element equals its ______.
Which element is commonly used in nuclear reactors for producing electricity by nuclear fission?
The percentage of nitrogen in urea is :
What are diatoms?
