Jake uses a fire extinguisher to put out a small fire. when he squeezes the handle, the flame rettardant is released from the extinguisher with considerable force. as a result, jake has to reinforce his grip on the extinguisher to hold it in place as it pushes back into his hands. the projectile in this scenario is the . the recoil in this scenario is the . the force on the flame rettardant is the force on the extinguisher. the mass of the flame rettardant is the mass of the extinguisher. the acceleration of the flame rettardant is the acceleration of the extinguisher.

Students in an introductory physics lab are performing an experiment with a parallel-plate capacitor made of two circular aluminum plates, each 11 cm in diameter, separated by 1.0 cm. how much charge can be added to each of the plates before a spark jumps between the two plates? for such flat electrodes, assume that value of 3×106n/c of the field causes a spark.

7. see worksheet 1 for values of variables x1, x2 and x3 and answer the following questions: a. for each variable find the mean, median, coefficient of skewness, range and population standard deviation. b. compared to variable x1, how are the mean and median affected by extreme values (outliers) seen in x2 and x3. c. is the median or mean the better measure of location for x2 and x3? explain. d. explain the differences in the magnitudes of the skewness coefficients for the three variables. e. what is the relationship between the range and standard deviation looking across the three variables?

Resistivity of a material is the resistance of a cm long sample of the material of 1 cm2 cross-sectional area.