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Newton’s First Law of Motion explains how inertia affects moving and non-moving objects. Newton’s first law states that an object will remain at rest or move at a constant speed in a straight line unless it is acted on by an unbalanced force. Objects with more mass have more inertia.

The green house effect. The waves of smaller wavelength from the sun enter inside the car through the glass windows and are absorbed. The waves of larger wavelength emitted from inside cannot get out through the glass, but remain inside and make it terribly hot.

It is possible to have three non-collinear vectors to cancel out. This happens when the three vectors can be translated to form a triangle with directions of those vectors either forming a clockwise motion or an anti-clockwise motion.

High pressure is usually associated with Fair weather, in other words clear skies. When the air cools, it gets denser and it is pushed down to the ground. Now the pressure increases because as the air is pushed down, it leaves more room for more air to fill in that space. As the warm air rises up to fill in that space, it evaporates the moisture in the air that would have made clouds.

Let M and m grams be the mass of boat + rock in it. By law of floatation(M+m) grams of water will be displaced. This has a volume of (M+m)cc. That means the level of water in pool has risen up by (M+m)cc with the boat + rock when it is floating. If the rocks in the boat are thrown not into the pool but outside, the weight left is only M grams the weight of the boat. This will have displaced M cc of water only i.e less water than in the case of loaded boat. But if the rocks are put in the water in the pool and not outside, then the water in the pool will rise not only by M cc on account of empty boat but also by a volume of the stone put into it. This volume will be md where m is the mass of rock and d density of rock.

Now md is < m. Thus the total rise will be (M+md)which is < M + m.

A scalar quantity is a one-dimensional measurement of a quantity, like a temperature, or mass. A vector has more than one number associated with it. A simple example is a velocity. It has a magnitude, called speed, as well as a direction, like North or Southwest or 10 degrees west of North.

Torque, moment, or moment of force is the rotational equivalent of linear force. The concept originated with the studies of Archimedes on the usage of levers. Just as a linear force is a push or a pull, a torque can be thought of as a twist to an object.

When the piece of iron is lowered into the water, the water level in the bucket increases. And so the pressure at the bottom of bucket also increases. Thus the total thrust at the bottom also increases. Therefore the spring balance reading increases.

Aluminium being a good conductor of heat conducts away the heat from the substance quite easily and causes quick freezing.

It is because of inertia of motion. Since the passenger was in motion initially,his body tends to be in state of motion but as he gets out,his upper body is still in motion while his feet are suddenly at rest due to which he falls with head forward.

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