Two dynamically similar hydraulic turbines operate with same effective head. if their speed ratio n1/n2 2, what is their power ratio, w1/w2 = ? a)- 0.25 b)- 4 c)- 2 d)- 1

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car

If a car is traveling on the highway at a constant velocity, the force that pushes the car forward must be a. equal to the weight of the car. b. less than the force of friction exerted upon the car. c. equal to the force of friction exerted upon the car. d. greater than the weight of the car.

A60-gram sample of radioactive isotope is measured after two half-lives have passed. what pair of percentages describe the sample after two-half lives? a.) 50% unchanged and 50% stable b.) 25% unchanged and 75% stable c.) 12.5% unchanged and 87.5% stable d.) 75% unchanged and 25% stable