Light is an electromagnetic wave and travels at a speed of 3.00 × 108 m/s. the human eye is most sensitive to yellow-green light, which has a wavelength of 5.04 × 10-7 m. what is the frequency of this light?

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.)

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

Which of the following are appropriate acceleration units?