An engineer conducts a tensile test for ductile material, britte material, and malleable material. based on the experimental data, the stress-strain curve for the three materials is developed for which of the following materials is the stress-strain curve steeper (has higher slope)? a)-ductile material b)-brittle material c)-malleable material d)-none of the other answers

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° 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.)

At what time will the interfering waves have an amplitudeof zero?

What are known as the properties of substances that describe a substance et does not change that substances?