A5cm tall object is placed 4cm in front of a converging lens that has a focal length of 8cm. where is the image located in cm? a. -8 cm b. -4 cm c. -5 cm d. -2 cm

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.)

It is really hard for me right know

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.