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Estimate your age in minutes and seconds. Assuming an average age of 20 years: 1 year = 365.25 days (accounting for leap years). 1 day = 24 hours = 1440 minutes = 86,400 seconds. Therefore, Age in minutes = 20 × 365.25 × 1440 = 10,513,200 minutes. Age in seconds = 10,513,200 × 60 = … Read more
Related Questions: Dynamics-1 Dynamics-II Pressure and Deformation in Solids Work and Energy Density and Temperature Magnetism Q.1 How does physics play an important role in our life? Q.2 Estimate your age in minutes and seconds. Q.3 What base quantities are involved in these derived physical quantities; force, pressure, power and charge. Q.4 Show that prefix … Read more
Statements: 1. Write the following numbers in scientific notation: a. 1234 m b. 0.000023 s c. 469.3 × 10⁷ m d. 0.00985 × 10⁵ s 2. Express the following measurements using prefixes: a. 27.5 × 10⁶ m b. 0.00023 × 10⁹ s 3. If a boy is 15 years, 2 months, and 10 days old, … Read more
Look at the figure of the screw gauge, let a small steel ball is place between its thimble and anvil then: a. What is its main scale reading? b. What is the coinciding division of circular scale? c. Calculate the total diameter of the ball. Ans: a. The main scale reading … Read more
Look at the measurement of vernier calipers: a. What is its main scale reading? b. What is its coinciding division on the vernier scale? Calculate the total reading on the vernier calipers. Ans: a. The main scale reading (reading to which zero of vernier scale coincides) is 2.5 cm. … Read more
What is pitch and least count of: a. Vernier calipers if the smallest division on the main scale is 1 mm and total divisions on the vernier scale are 20. b. Screw gauge if the smallest division on its main scale is 0.5 mm and its movable scale has 50 divisions. Ans: a. The least … Read more
How many kilometers are there in 25 micrometers? Ans: As there are 103 meters in a kilometer and 10-6 meters in a micrometer, so 25 μm = 25 x 10-6 m = 25 x 10-6 x 10-3 km 25 μm = 25 x 10-9 km = 25 /10 x 10-9 x 101 km 25 μm … Read more
If a boy is 15 years 2 months and 10 days, convert his age in a. seconds b. milliseconds c. mega seconds Ans: A year has 12 months. Each month has 30 days. Every year has 365 days. A leap year that comes every four years has 366 days. As his age is 15 years … Read more
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