Sume los siguientes vectores, por el método gráfico y analítico luego halle la magnitud y ángulo de cada uno. (2i + 2j) + (-3i + 2,5j)
(2i +20j) + (0,5i + 2j)

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)

The force acting on a beam was measured under the same operating conditions and a sample of 5 data points was collected. this process was repeated by 3 observers. the pooled standard deviations of these 3 data sets was 1.21. determine the true mean force using all pooled data (with a 95% probability). the result should look like this: true mean = mean +/- margin of error

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.