Hypothesis: How would increasing the mass effect the PE, KE and total energy of the system? Mass would make potential energy increase and it would make kinetic energy decrease. Hit reset and click energy graph, ruler and timer.
Mass of Pendulum
BobPeriod (secs)Kinetic Energy (cm)
At bottomKinetic Energy (cm)
At topPotential
Energy(cm)
At BottomPotential
Energy(cm)
At TopTotal Energy (cm)
.15 grams1.78 s
.30 grams
.50 grams
.80 grams

Amachinist needs to remove a tight fitting pin of material a from a hole in a block made of material b. the machinist heats both the pin and the block to the same high temperature and removes the pin easily. what statement relates the coefficient of thermal expansion of material a to that of material b? a) the situation is not possible, heating block b will shrink the hole in the material as the material expands with increasing temperatureb) material b has the same coefficient of expansion as does material ac) material b has a negative coefficient of expansion and a has a positive coefficient of expansiond) material a has a greater coefficient of expansion than does material be) material b has a greate

Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)

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