Combined each of the questions into separate questions: 1. What do you mean by anomalous expansion of water? Draw a graph to show the variation in density of water with temperatu... Combined each of the questions into separate questions: 1. What do you mean by anomalous expansion of water? Draw a graph to show the variation in density of water with temperature in the temperature range from 0°C to 10°C. 2. What do you mean by Global warming? 3. How will global warming affect the sea level? 4. State one way to minimize the impact of global warming 5. An object 5cm high is placed at a distance 60cm in front of a concave mirror of focal length 10cm. Find the position of the image. 6. An object 5cm high is placed at a distance 60cm in front of a concave mirror of focal length 10cm. Find the size of the image. 7. What is an altimeter? 8. What do gradual fall and sudden fall indicate in a barometer regarding weather? 9. What force is applied on a piston of area of cross section 2cm^2 to obtain a force 150N on the piston of area of cross section 12cm^2 in a hydraulic machine? 10. Name one application of Pascal's law. 11. Give one example of a body that has potential energy due to its position at a height. 12. Give one example of a body that has potential energy due to its elongated stretched state. 13. A horse and a dog are running with the same speed. Which one of them has more kinetic energy than the other? Why?

Question image

Understand the Problem

This appears to be a science homework assignment for middle school. Let's break down the questions:

  • Question 7: Asks about anomalous expansion of water, global warming and its impact, and requires calculation of image position and size using a concave mirror.
  • Question 8: Covers topics like altimeters, barometer readings, Pascal's law, potential energy, and kinetic energy.

We need to categorize each question appropriately to provide the best assistance.

Answer

Answers to questions about anomalous expansion of water, global warming, concave mirrors, altimeters, barometers, Pascal's law, potential energy, and kinetic energy are provided.

Here are the answers to the questions:

  1. Anomalous expansion of water is the property where water expands instead of contracting when its temperature decreases from 4°C to 0°C. The density of water is maximum at 4°C and decreases as it cools to 0°C.

  2. Global warming is the long-term heating of Earth's climate system observed since the pre-industrial period due to human activities, primarily fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth's atmosphere.

  3. Global warming causes sea levels to rise due to thermal expansion of water and melting of glaciers and ice sheets.

  4. One way to minimize the impact of global warming is to reduce the use of fossil fuels and switch to renewable energy sources.

The position of the image is -12cm.

  1. The size of the image is 1cm

  2. An altimeter is an instrument used to measure altitude.

    • Gradual fall in a barometer indicates approaching rain or unstable weather.
    • Sudden fall indicates a storm is approaching.

  4. The force applied on the smaller piston is 25N.

  5. One application of Pascal's law is in hydraulic brakes.

  6. An example of a body with potential energy due to its position at a height is a book on a shelf.

  7. An example of a body with potential energy due to its elongated stretched state is a stretched rubber band.

  8. The horse has more kinetic energy because kinetic energy depends on both mass and speed, and a horse typically has a greater mass than a dog.

Answer for screen readers

Here are the answers to the questions:

  1. Anomalous expansion of water is the property where water expands instead of contracting when its temperature decreases from 4°C to 0°C. The density of water is maximum at 4°C and decreases as it cools to 0°C.

  2. Global warming is the long-term heating of Earth's climate system observed since the pre-industrial period due to human activities, primarily fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth's atmosphere.

  3. Global warming causes sea levels to rise due to thermal expansion of water and melting of glaciers and ice sheets.

  4. One way to minimize the impact of global warming is to reduce the use of fossil fuels and switch to renewable energy sources.

The position of the image is -12cm.

  1. The size of the image is 1cm

  2. An altimeter is an instrument used to measure altitude.

    • Gradual fall in a barometer indicates approaching rain or unstable weather.
    • Sudden fall indicates a storm is approaching.

  4. The force applied on the smaller piston is 25N.

  5. One application of Pascal's law is in hydraulic brakes.

  6. An example of a body with potential energy due to its position at a height is a book on a shelf.

  7. An example of a body with potential energy due to its elongated stretched state is a stretched rubber band.

  8. The horse has more kinetic energy because kinetic energy depends on both mass and speed, and a horse typically has a greater mass than a dog.

More Information

These answers cover a range of physics and environmental science topics, providing explanations and examples for each question.

Tips

Pay attention to the units and formulas when solving numerical problems. Remember the definitions and concepts for the descriptive questions.

Sources

AI-generated content may contain errors. Please verify critical information

Thank you for voting!
Use Quizgecko on...
Browser
Open
Browser
Browser