For a system to transmit thousands of telephones conversations, several television programs and numerous data signals, it need the following number so threads of optical fibre
A train us moving with a velocity of 25 m/s and a car is moving behind it by a velocity of 8 m/s in same direction The relative velocity of train with respect to car is
The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart,with force of repulsion between the spheres to be 10-19 N,is
A rubber cord 100 cm long is elongated 1 cm by a stretching force of 0.2 N. The cross-sectional area of the cord is 0.04 cm2. Find the Young's modulus for that rubber.
An excess af silver nitrate is added to the aqueous barium chloride and the precipitate is removed by filtration. What are the main ions in the filtrate?
A student mixed ethyl alcohol with small amount of sodium dichromate and added it to the hot solution of dilute sulphuric acid. A vigorous reaction took place. He distilled the product formed immediately. What was the product?
Surface and ground water sources are contaminated by various human activities. Which of the following is not a human activity that cause contamination of fresh water?
A student put two eggs A and B in HCL solution, After five minutes he took them out for weighing but egg dropped in water accidentally. The student was able to take it out after 30 minutes, He weighed it, Its weight was 40.33g. Weight of egg B was also 40.33g. Teacher told him that if both eggs have been dropped in water, the weight of egg B would have been:
Surface and ground water sources are contaminated by various human activities. Which of the following is not human activity that causes contamination in fresh water
.Both aldehydes and ketones are planar to the neighborhoods of carbonyl (C-0) group. Which one of the following bonds is distorted towards the oxygen atoms?
Thick-walled dormant bodies formed during differentiation of vegetative cells that resist desiccation and can germinate under suitable conditions are called
The hubble space telescope will search for planets around other stars, a key to the ___________ for extra terrestrial life, and examine interstellar dust and gases out of which stars are born.
Even though he is a leading authority on the French Revolution, the chairperson of the department is a __________ speaker wohos lectures on even the most exciting aspect of that historical period cause students to yawn and fidget.
If science can find a cure for cancer if the nuclear arms race can be stopped and if people can work together to resolve mutual differences are the topics around which the seminar has been planned
Harriman Kennan, and Acheson were part of that inner ______ of the American diplomatic establishment whose distinguished legacy ______ U.S. foreign policy
Although the manager agreed to more flexible work schedule he said that it must be posted on the bulletin board so that both management and labour will know that everyone is assigned to do
