Atrain travels in a straight line at 15.0 m/s for 2 km, then at 30.0 m/s for another 2 km. part a part complete is the average speed of the train greater than, less than, or equal to 25 m/s? is the average speed of the train greater than, less than, or equal to 25 ? the average speed of the train is less than 25 m/s. the average speed of the train is greater than 25 m/s. the average speed of the train is equal to 25 m/s. previous answers correct part b verify your answer to part a by calculating the average speed. express your answer to three significant figures and include the appropriate units.

The coulomb's law explains which of the following? select all the force between two charged objects is inversely proportional to the charge on each object. the force between two charged objects is directly proportional to the charge on each object. the force between two charged objects is directly proportional to the distance separating them. the force between two charged objects is inversely proportional to the square of the distance separat coulomb's law is similar to newton's 2nd law. if the force between two objects is f and the charge on both objects is doubled, the new force between the would now be 2f. if the force between two objects is 2f and the distance separating them is doubled, the new force between the objects would now o the be zf.

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

Estimate the change in the gibbs energy and molar gibbs energy of 1.0dm3 of octane when the pressure acting on it is increased from 1.0 atm to 100 atm. the mass density of octane is 0.703 g cm−3