A hydroelectric power plant uses spinning turbines to transform the kinetic energy of moving water into electric energy with 74 % efficiency. That is, 74 %of the kinetic energy becomes electric energy. A small hydroelectric plant as the base of a dam generates 50 MW of electric power when the falling water has a speed of 18 m/s.

What is the water flow rate − kilograms of water per second − through the turbines?

We all use gps today, even if we don't drive yet. i bet you have been in the car with a parent and they have asked you to get out your phone to find a specific location. in your car, on the phone, you are using a very sophisticated technology. gps satellites circle the earth twice a day in a very precise orbit and transmit signal information to earth. gps receivers take this information and use trilateration to calculate the user's exact location. essentially, the gps receiver compares the time a signal was transmitted by a satellite with the time it was received. the time difference tells the gps receiver how far away the satellite is. now, with distance measurements from a few more satellites, the receiver can determine the user's position and display it on the unit's electronic map. what type of signal is utilized by the gps satellite?

You notice a very one-dimensional-thinking snail crawling along one rail of a railroad track. naturally, you remove it to a safer place. but before you do, you observe it as it moves from position xi = -92.9 cm to position xf = -64.9 cm along the rail, as measured from a point where one rail abuts the next. what is the snail\'s displacement δx in centimeters?

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's