The wind in Toledo gusts up to a sustained speed of 20 m/s. Assuming the air density of 1.29 kg/m3, calculate the total force exerted on a flat roof having an area of 100 m2.

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

Explain the difference between each pair of concepts. a. frequency and relative frequency b. percentage and relative frequency a. select the correct choice below. a. frequency is the total number of observations in a data set. relative frequency is the number of times a particular distinct value occurs. b. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of a value to the total number of observations. c. frequency is the total number of observations in a data set. relative frequency is the ratio of the number of times a particular distinct value occurs to the frequency. d. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of two different values.

Convection occurs when thermal energy is transferred by the movement of