For most purposes, we store electrical energy in batteries. but there are drawbacks to batteries: a)they release their energy rather slowly and are very damaging environmentally. b) capacitors would be much cleaner for the environment and can be quickly recharged. c) unfortunately they don’t store much energy.

An object's buoyant force and weight mean the same thing.a. trueb. false

If the spring constant k of a pogo stick is 3500 n m and the weight of the person on the pogo stick is 700 n, how much is the spring in the botom of the pogo stick compressed?

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?