A child is standing on the platform of a train station. The train is travelling 30 m/s and takes 3.0s to pass the child.
What is the length of the train?

Identify the arrows that show the correct direction of heat transfer. 66°f 112°f 98°f

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Order the sequence of ideas that lead to marie curies discovery of radioactive elements number the events in chronological order starting with the oldest