Science Worksheet (Set 3) Focus: Chapters 7, 8, and 9 Q1. Answer briefly: a. A spaceship travels 36,000 km in one hour. Express its speed in km/s.Speed = Distance / Time = 36000 km / 1 hour = 36000 / 3600 km/s = 10 km/sb. State the factors on which the time period of …
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Light and Optics Worksheet (Set 2) Q2. Short Answer Type Questions: a. Evaluate the significance of dispersion in natural phenomena.Dispersion of light causes the formation of a rainbow and gives color to the sky.b. The concave reflecting surface of a torch got rusted. What effect would this have on the beam of light from …
Light and Optics Worksheet (Set 2) – Short Answer Questions with Answers Read More »
Light and Optics Worksheet with Answer Key Q1. Answer briefly: 1. When we sit in front of a plane mirror and write with our right hand, it appears in the mirror that we are writing with the left hand. Name the phenomenon responsible for this.Lateral Inversion2. Name the mirror used as a shaving mirror.Concave …
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Image Formation by Concave & Convex Mirrors and Lenses: Complete Table Image Formation by Concave and Convex Mirrors Mirror Type Object Position Image Position Image Size Image Nature Image Side Concave At infinity At ( F ) Highly diminished (point-sized) Real, Inverted Other side (In front of the mirror) Concave Beyond ( C ) Between …
Image Formation by Concave & Convex Mirrors and Lenses: A Complete Guide with Tables Read More »
In a mechanical wristwatch, which part works in the same wayas a pendulum in a clock? The discovery of which principle made the accurate measurementof time possible? What is this principle? Explain with a diagram. Solution & Explanation Answer to Q1 In a mechanical wristwatch, the balance wheel (often combinedwith a spiral hairspring) functions …
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Questions Q1. A car travels along a circular racing track at a constant speed of 100 km/h. Does it have uniform motion? Justify. Q2. A simple pendulum is oscillating between two points, A and B. Describe its motion in a few sentences by using the key words: periodic, time period, uniform, interval, time, and displacement. Q3. …
Uniform vs. Non-Uniform Motion, Pendulum Oscillations, and Speed Conversion Read More »
Question Q12. Starting from point A, Krati moves along a rectangular path ABCD as shown in the image. She takes 2 minutes to travel each side. Plot a distance-time graph and explain whether the motion is uniform or non-uniform. Image Description Rectangular path shows a rectangle labeled ABCD. The top side AB is 8 m, the right …
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Question: In a simple pendulum experiment, the bob takes time t1 to move from its extreme position A to some intermediate point C, and t2 to move from C to the mean position O. Prove that the time period T of the pendulum is ( 4 bigl(t_{1} + t_{2}bigr). ) Given: The bob moves from …
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Question 9 (i):A sinker is found to weigh 56.7 gf in water. When the sinker is tied to a cork of weight 6 gf, the combination is found to weigh 40.5 gf in water. Calculate the relative density of cork. Solution to Question 9 (i) Given: Weight of the sinker in water,( W_{s,w} = 56.7 …
Solutions to Grade IX ICSE Fluids Numerical Test (4th Feb 2025) Graded Worksheet 1 (Total Marks: 50) 1. Pressure exerted by high heels A woman weighing 600 N stands on heels with a contact area of 1 cm2. Converting area: (1~text{cm}^2 = 1 times 10^{-4}~text{m}^2). Pressure, (P = dfrac{600}{1 times 10^{-4}} = 6 times 10^6~text{Pa}). …
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