Lab 19: PHYS 4A Lab--Conservation of Energy/Conservation of angular momentum

lab 6- Propagated Uncertainty in Measurements

Propagated Uncertainty in Measurements Purpose Learn how to calculate propagated uncertainty in density measurements with different metal material cylinders. Process First, we need to measure the density of two cylinders made of different materials . To measure the density we should measure its mass m, diameter d and height h. Mass(g) Diameter(cm) Height(cm) 69.4 1.55 5.01 27.6 1.59 4.98 So the density of the first material is about 7.31 g/cm^3, which may be zine. The density of the second material is about 2.80 g/cm^3, which may be aluminum. Then we should calculate the propagated uncertainty of the density. For a cylinder, its density can be calculate with the equation p=(4/∏)* [m/(d2*h)]. The differential form of this equation is dp= (∂p/∂m)*dm + (∂p/∂d)*dd + (∂p/∂h)dh, which equals to The calculation is attached below. Conclusion In this lab, we learnt ho...

Lab 1 Feb.27: Finding a relationship between mass and period for an inertial balance.

Physics 4A, Lab 1: Author: Jiarong Song (Nina), Joel Date of Lab: Feb 27 Purpose Statement: To determine the inertial mass of an unknown object by using the relationship between mass and period on an inertial balance, and using this model to determing the unknown masses of some other objects. Procedure: Use a C-clamp to secure the inertial balance to the tabletop. Put a thin piece of masking tape on the end of the inertial balance. Set up a photogate so the when the balance is oscillating the tape completely passes through the photogate. Hit collect and pull back the release the inertial balance the computer starts measuring a reasonable period. Record the period with no mass in the tray first. Adding 100g each time and record the data in table. Measured data: Mass in balance (g) Period (sec.) Mass in balance (g) Period (sec.) 0 0.283 500 0.547 100 0.346 ...

Phys4AS17 jsong

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