3 characteristics of physical change

What is the difference between density and specific gravity

Water erosion occurs when water seeps into cracks or joints in rock and then freezes.

A 0.002 kg arrow with an acceleration of 7.2 m/s2 is flying towards its target. How much force was exerted on the arrow? a. 0.0036 N b. 0.0052 N c. 0.0102 N d. 0.0144 N

Which of the following is an example of a force? A. push B. pull C. inertia D. both A and B E. all of the above

What can you infer about copper and sliver based on their position relative to each other on the periodic table?

Show your conversions on the right 8500 mm 2. 250 mg 3. 500000 g 4. 201 = 5. 0.5 Km 6. 350 mm

As one goes from left to right in a period, which of the following is true? A. The number of protons decreases. B. The number of valence electrons increases. C. both A and B D. none of the above

Which phrases describe organisms that formed index fossils

What will happen to plant height if the amount of available light is reduced due to global dimming? Which type of investigation would most likely be conducted to answer the following question?

A machine has an efficiency of 80%. How much work must be done on the machine so to make it do 50,000 J of output work?