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a. 27.5 x 10-10 m b. 0.00023 x 10-2 s Ans: a. 27.5 x 10-10 m We will convert the number first to scientific notation. For this purpose, we have to move the decimal to bring it in between 2 and 7. 27.5 x 10-10 m = 2.75 x 10+1 x 10-10 … Read more
a. 1234 m b. 0.000023 s c. 469.3 x 105 m d. 0.00985 x 107 s Ans: a. 1234 m The decimal should be between 1 and 2. So, we have to move 3 steps towards the left that’s why the power will be positive 3. The result will be: 1234 … Read more
Ans: Due to the vast scope and research in physics, it is usually divided into several branches some of them given below: Mechanics: Description: Motion of objects and how it relates to forces. Examples: falling objects, friction, weight, spinning objects Heat and Thermodynamics: Description: Heat and temperature their related to energy. Examples: melting and freezing … Read more
Ans: Physics: ‘Physics can be defined as the study of matter and energy’. Physics and Technology: Rockets and space shuttles, magnetically levitating trains, and microscopic robots that fight cancer cells in our bodies. All of these technologies, whether ordinary or exciting, are based on the principles of physics. Physics is behind every technology and plays … Read more
Ans: Differentiate between precision and accuracy. Precision Accuracy (i) Precision refers to the degree of consistency or reproducibility of measurements. (i) Accuracy refers to the degree of closeness between a measured value and the true or accepted value. (ii) A measurement is precise if repeated measurements under the same conditions yield similar results, regardless of … Read more
Ans: Random errors are unpredictable and uncontrollable errors that can happen irregularly. These errors can be caused by fluctuations in experimental conditions or imperfections in measuring instruments. Random errors can be reduced by increasing the number of measurements and using more precise measuring instruments. To minimize random errors, it is important to take repeated measurements … Read more
Ans: We need to consider significant digits in measurements to accurately convey the precision and reliability of the measured quantity. Significant digits help us understand the level of uncertainty associated with measurement, facilitate error analysis, ensure accurate mathematical operations, and enable clear communication of scientific findings. By paying attention to significant digits, we can convey … Read more
Ans: i. The measuring cylinder should be placed on a flat surface so that the upper surface of the water in the cylinder shows the same level. ii. The volume of the liquid should be read or the cylinder should be graduated from the base of the meniscus. Related Questions: Q.8 How measuring cylinder … Read more
Ans: A measuring cylinder can be used for measuring the volume of an irregular solid body such as a metallic bob as shown in the figure. When the object is completely immersed the volume of the water is read again. The volume of the object is found by subtracting the first reading from the second. … Read more
Ans: Differentiate between Mechanical Stopwatch and Digital Stopwatch. Mechanical Stopwatch Digital Stopwatch It has two circular dials. It has no dials but a screen. It has one knob which is used for It has two buttons. Pressing the left starting and stopping the stopwatch. By button starts the timer and long pressing this knob will … Read more