Why concave mirror is a convergent mirror? If a glass sphere is cut down and mercury is added to the convex side of the sphere so that light will be reflected from the inside concave shape, then it is a concave mirror.
What is the relation between force, pressure, area? The relation between force, pressure, area is given below – Pressure = Force ፥ Area
What is pressure? Pressure is a measure of the force exerted on a surface per unit area. It is a scalar quantity expressed in units of force per unit area, such as pascals (Pa), pounds per square inch (psi), atmospheres (atm), or millimeters of mercury (mmHg). Pressure results from the weight of a column of … Read more
Why it is not possible to avoid random errors? Random error is inherent in all measurement and observation processes, and it is not possible to completely eliminate it. Random error is caused by unpredictable and uncontrolled factors, such as measurement inaccuracies, variations in conditions, or limitations of the measuring instruments. These sources of error cannot … Read more
The acceleration is not created when the velocity is changed. We know, the rate of change of velocity concerning time is called acceleration. If a body does not move with velocity then we say there is no velocity. So the velocity is zero. As a result, the rate of acceleration is zero. Since the acceleration … Read more
Why did the passenger lean forward? When a sudden brake is applied in a moving bus the passengers lean forward because of the inertia of motion. When a bus is in motion, the passenger of the bus is also at the same speed as the bus. When the bus stops suddenly, the lower part of … Read more
Explain why the velocity of sound is uniform? The velocity of sound is a good example of a natural phenomenon in the case of uniform velocity. Sound travels in a defined direction over equal distances in equal intervals of time and it is 332 ms⁻¹ in the air at 0°C. Sound travels in a definite … Read more
In universe every rest and speed is relative. No rest or no motion is absolute- Explain it with example. Actually whether an object is at rest or not depends on the reference object. If the reference frame is actually in rest, the object will be actually in rest with respect to that frame. This type … Read more