Iraqi Third Intermediate Ministerial Exams · General Science

Calculations in science

39 practice questions, each with the answer and an explanation.

Practise Calculations in science now

Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 39 questions

  1. An object travels 300 m in 20 s. What is its average speed?
  2. An object travels 600 m in 40 s. What is its average speed?
  3. An object travels 90 m in 6 s. What is its average speed?
  4. An object travels 840 m in 60 s. What is its average speed?
  5. A car of mass 800 kg accelerates at 2 m/s squared. What is the resultant force on it?
  6. A car of mass 1200 kg accelerates at 4 m/s squared. What is the resultant force on it?
  7. A car of mass 50 kg accelerates at 6 m/s squared. What is the resultant force on it?
  8. A car of mass 20 kg accelerates at 9 m/s squared. What is the resultant force on it?
  9. A block has a mass of 540 g and a volume of 200 cubic cm. What is its density?
  10. A block has a mass of 1560 g and a volume of 200 cubic cm. What is its density?
  11. A block has a mass of 270 g and a volume of 100 cubic cm. What is its density?
  12. A potential difference of 9 V is applied across a 3 ohm resistor. What current flows?
  13. A potential difference of 24 V is applied across a 6 ohm resistor. What current flows?
  14. A potential difference of 30 V is applied across a 10 ohm resistor. What current flows?
  15. A force of 50 N moves an object 4 m in the direction of the force. How much work is done?
  16. A force of 120 N moves an object 3 m in the direction of the force. How much work is done?
  17. A force of 30 N moves an object 10 m in the direction of the force. How much work is done?
  18. A force of 200 N moves an object 2 m in the direction of the force. How much work is done?
  19. A force of 40 N moves an object 5 m in the direction of the force. How much work is done?
  20. A machine does 600 J of work in 20 s. What is its power?
  21. A machine does 1500 J of work in 50 s. What is its power?
  22. A machine does 2400 J of work in 60 s. What is its power?
  23. A machine does 350 J of work in 7 s. What is its power?
  24. A force of 200 N acts evenly on an area of 4 square m. What pressure is exerted?
  25. A force of 1000 N acts evenly on an area of 5 square m. What pressure is exerted?
  26. A force of 45 N acts evenly on an area of 15 square m. What pressure is exerted?
  27. What is the kinetic energy of a 4 kg object moving at 5 m/s?
  28. What is the kinetic energy of a 5 kg object moving at 4 m/s?
  29. What is the kinetic energy of a 8 kg object moving at 3 m/s?
  30. What is the gravitational potential energy gained by a 2 kg object lifted 5 m? (take g = 10 N/kg)
  31. What is the gravitational potential energy gained by a 4 kg object lifted 3 m? (take g = 10 N/kg)
  32. What is the gravitational potential energy gained by a 6 kg object lifted 4 m? (take g = 10 N/kg)
  33. A student scored 12% of the 500 marks available in a test. How many marks did the student get?
  34. A student scored 40% of the 90 marks available in a test. How many marks did the student get?
  35. A student scored 8% of the 250 marks available in a test. How many marks did the student get?
  36. 200 g of water at 80 °C is mixed with 300 g of water at 30 °C. Ignoring heat losses, what is the final temperature?
  37. 100 g of water at 90 °C is mixed with 400 g of water at 20 °C. Ignoring heat losses, what is the final temperature?
  38. 150 g of water at 60 °C is mixed with 50 g of water at 20 °C. Ignoring heat losses, what is the final temperature?
  39. 300 g of water at 70 °C is mixed with 200 g of water at 20 °C. Ignoring heat losses, what is the final temperature?

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