ocean currents travelling

A steamer travels the distance between the two ports in 9 hours, when it goes downstream. When it goes upstream, it covers the same distance, 396 km in 11 hours. Find the speed of the steamer and the current. Assume that both are constant. => 36, 44 or 40, 4 or 40, 80 or 36, 40 ..

Man is surrounded by an ocean of energy. Mankind has tapped only a fraction of it. The most colossal dynamo of all is the sun, an unimaginable vast powerhouse which affects everything on earth. From time immemorial man has learnt to harness this energy. In 100 B.C. Romans used coal ..

Man is surrounded by an ocean of energy. Mankind has tapped only a fraction of it. The most colossal dynamo of all is the sun, an unimaginable vast powerhouse which affects everything on earth. From time immemorial man has learnt to harness this energy. In 100 B.C. Romans used coal as a f..

Introduction - Man is surrounded by an ocean of energy. Mankind has tapped only a fraction of it. The most colossal dynamo of all is the sun, an unimaginable vast powerhouse which affects everything on earth. From time immemorial man has learnt to harness this energy. In 100 B.C. Romans u..

Earth is the only planet in our solar system, which is surrounded by oxygen, the life giving gas. It is the only planet to have large quantities of water. Earth's atmosphere contains oxygen, nitrogen, carbon dioxide and water vapour. Earth Earth is a medium sized planet with a thick atmosphere. The..

. But soon, they blame the killing for the condition in which they are. They however, change their opinion and their fickleness is shown when they enter the more temperate climate and the glorious sun rises brightly again. All the sailors now praise him for killing the bird that had brought the fog..

. In these methods, the energy is said to be transferred in the form of waves. Other examples of energy propagation by transfer of matter are Electric current in a wire Air currents set up by unequal heating of the surface of the Earth Ocean tides in which energy is tr..

Question: What are anode rays? State three properties of anode rays. Answer: Anode rays are stream of positively charged particles shot out from the anode of a discharge tube when a current is passed through a gas. Anode rays travel in straight lines. They cast sh..

Intrinsic Semiconductors - The atoms in a crystal are strongly held by covalent bonds in space at tetrahedral angles. On receiving energy, a covalent bond breaks and an electron is free to move in crystal lattice. This electron leaves an empty space (shown as an open circle) called a hole. An elect..

Progressive waves Stationary waves The disturbance produced in the medium travels onward, it being handed over from one particle to the next. Each particle executes the same type of vibration as the preceding one, though not at the same time. There is no onward motion of the ..