Which of the following is a true

Energy cannot be changed from one form to another.

Energy can change from one form to another.

Energy can only change into heat energy.

Energy can be produced by living things.

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer