freight train consists of 2 engines at the front, followed by 28 rail cars. Both the engines and rail cars have the same mass of 361,165 kilograms each. Each engine exerts the same force backward on the track to push the train forward. The total force of friction on the entire train is 899,976 N and is evenly distributed among all of the cars and engines. Even with this friction present, the train engines are able to accelerate the train at 0.036 meters/second2. What is the magnitude of the force in Newtons that each engine would need to exert on the train track

What would the difference of spectral lines emitted by hydrogen gas in distant galaxies which is normally found at a wavelength of 21 cm on earth, be observed at 21.1 centimeters?

Acrow drops a 0.11kg clam onto a rocky beach from a height of 9.8m. what is the kinetic energy of the clam when it is 5.0m above the ground? what is its speed at that point?

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.