G"the force exerted on a bridge pier in a river" is to be tested in a 1: 10 scale model using water as the working fluid. in the prototype the depth of water is 2.0 m, the velocity of flow is 1.5 m/s and the width of the river is 20 m. of the hydrodynamic force on the model bridge pier is 5 n, what would it be on the prototype? (hint: pressure ratio is equal to the length-scale ratio) (5 points; ans: 5000 n)

Which statement correctly describes the current in a circuit that is made up of any two resistors connected in parallel with a battery? a. the current in the battery and in each resistor is the same b. the current the battery equals to the sum of the currents in the resistors c. the current in the battery is less than the current in either resistor d. the current in the battery equals to the product of the currents in the resistors

The friction of the water on a boat produces an acceleration of -10. m/s2. if the boat is traveling at 30. m/s and the motor is shut off, how long it take the boat to slow down to 5.0 m/s?

Area around a charged object where the objects can exert a force on another charged objects is an electric