Question 1. Give two examples each of situations in which you push or pull to change the state of motion of objects Solution 1. Examples of situations in which you push or pull to change the state of motion of objects. Following are the situations in which we pull to change the state of motions: …
Question 1. List conditions under which combustion can take place. Solution 1. Combustion can take place under the following conditions. In presence of oxygen In presence of a combustible substance Acquisition of ignition temperature Question 2. Fill in the blanks. (a) Burning of wood and coal causes _____ of air. (b) A liquid fuel, used …
Introduction On a dark night in a clear atmosphere where there is no bright light, dust or smoke we can see the sky full of twinkling stars. we can notice many other objects that do not twinkle they are known as planets. The brightest object in the night sky is the moon. In the sky, …
Introduction One of the most important senses is the sense of light. We see a beam of sunlight, a beam of a headlight, and a beam of light from a torch. A beam of light from LED. Because of the light, we are able to see things around us. Like mountains, rivers, trees, sentences printed …
Introduction There is a variety of sounds that we hear in our surroundings like the sound of doorbells, the sound of footsteps, the chirping of birds, sound of musical instruments like flute, guitar, table etc. Sound helps us to listen and communicate with one another.
Introduction Moving objects like a rolling ball or swinging bob of a pendulum slows down slowly and come to rest after some time. This happens because of a force exerted in the opposite direction of the motion of the objects. Friction is a contact force acting in the opposite direction of the applied force. Friction …
Introduction An object like a ball can move from one place to another when you kick it. A moving object can change its direction, move faster or slower for example when a batsman hit a ball, it changes its direction so, what makes an object move, go faster, slow down, or change its direction? We …
