Which of the following are equal to -40of? check all that apply. a. -40oc b. -80oc c. 200 k d. 233 k

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

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.

Simple machines can a. increase force only b. decrease force only c. increase or decrease force