Collins science workbook class 7 answer key.
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Answer:
Collins science workbook.
Answer:
The freezing point of water is 0°C or 32°F.
Explanation:
From the above question,
They have given :
Collins Science Workbook is a series of three workbooks for classes 6 to 8, which are aimed at providing comprehensive practice for the development and understanding of scientific concepts. The worksheets are in accordance with the recommendations of the National Curriculum Framework 2005 and the syllabus prescribed by National Council of Educational Research and Training (NCERT).
Question 1: What is the freezing point of water?
Answer: The freezing point of water is 0°C or 32°F.
Question 2: What is the density of water?
Answer: The density of water is 1 gram per cm³ (or 1 g/cm³).
Question 3: What type of matter is water?
Answer: Water is a liquid.
Question 4: What is the mass of 1 liter of water?
Answer: The mass of 1 liter of water is 1kg.
Question 5: What is the formula for calculating the volume of a cylinder?
Answer: The formula for calculating the volume of a cylinder is V = πr²h, where V is the volume, r is the radius of the cylinder, and h is the height of the cylinder.
Question 6: What is the formula for calculating density?
Answer: The formula for calculating density is density = mass/volume, where density is the mass per unit volume.
Question 7: What type of energy is released when a substance boils?
Answer: When a substance boils, it releases thermal energy.
Question 8: What is the wavelength of visible light?
Answer: The wavelength of visible light ranges from 400 to 700 nanometers.
Question 9: What is the equation for calculating kinetic energy?
Answer: The equation for calculating kinetic energy is KE = ½ mv², where m is the mass of the object and v is the velocity of the object.
Question 10: What is the formula for calculating the surface area of a cube?
Answer: The formula for calculating the surface area of a cube is
SA = 6a², where a is the length of one side of the cube.
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