A17-car train standing on the siding is started in motion by the train’s engine. 9 cm slack is between each of the cars, which are 9 m long. the engine is tightly connected to the first car and moves at a constant speed of 36 cm/s. how much time is required for the pulse to travel the length of the train? answer in units of s.

Calculate the amount of heat produced when 18000 coulombs of charge is transferred in one hour through a potential difference of 50v

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

What causes the formation of ocean currents?