1 Fig. 4.1 shows a small wind-turbine used to generate electricity. The wind-turbine drives an electric generator.
The wind blows with a velocity of 7.0m/s at right angles to the plane of the turbine. The mass of air passing per second through the turbine is 6.7 kg.
(a) (1) Calculate the kinetic energy of the air blown through the turbine per second.
(ii) Only 8% of this energy is converted to electrical energy. Calculate the power output of the electric generator.​

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)

technology is the application of the knowledge gained by science.

305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures