areas of objects

.e., the volume of the liquid displaced equals the volume of the block under the liquid surface. In each case, as density of water is 1 g cm - 3 , you will notice that if the weight of water of the volume equal to the volume of the submerged part is calculated (the third column) it is equal to the ..

The figure below gives the speed-time graph of a car moving with a uniform speed of 60 km/h for 5 hours. Speed-Time Graph of a Car Moving with Uniform Speed Distance travelled by the car (S) = v x t But 60 km/h = OC = breadth of the rectangle OABC 5h = OA = length of the rectangle OAB..

Area which is dedicated for conservation of the environment, natural objects and the wildlife therein. Other forestry operations are prohibited but it is open to visitors who should not disturb or harm the protected plants or animal..

Any tall or massive objects will obstruct space waves, since they travel close to the ground. Consequently, shadow zones and diffraction will result. This is the reason for the need in some areas for antennas higher than would be indicated by Equation (1). On the other hand, som..

Hold a pin erect on a pile of papers. Keep another pin next to it upside down in such a way that its flat head rests on the pile. Press both these pins down by placing a flat object such as duster. We observe that pin which is erect pierces through the pile of paper..

The third mode of energy transfer between an object and its environment is via electromagnetic waves (visible light is a kind of electromagnetic wave). Energy transferred in this way is often called thermal radiation, to distinguish it from electromagnetic signals (as in, say, television ..

= breadth of the rectangle OABC 5hr = OC = length of the rectangle OABC i.e., the distance covered by the car = length x breadth = 300 km. i.e., in order to calculate the distance covered by a moving object from a speed-time graph we just have to find the area enclosed by the sp..

Thrust and Pressure - In the beginning of this chapter, we have defined the force as an external agent, which changes the direction of motion, speed or shape of the body. All along we were discussing only about the forces acting at a point on a body. Let us now consider the forces acting over an ..

Elastic bodies regain their original shape due to internal restoring forces. This internal restoring force, acting per unit area of a deformed body, is called a stress. An object can be deformed in different wa..

Humans depend on the forests largely to meet rapidly growing demands for timber, fibre, fuel, fresh water and food. All use forest produce in one form or other, e.g., when used as timber, paper, herbs and spices. Modern approaches in forest conservation have found that enforcement of forest laws ..