Chang sees the following formula on a
Newton's second law.
What does the symbol EF in the formula indicate that Chang
needs to do?
He needs to find the net force acting on the object in a
direction
He needs to use only forces acting in the direction of
motion
He needs to combine the horizontal and vertical forces.
He needs to multiply the horizontal and vertical forces.

Which of the following is not a part of a wave? question 2 options: a: frequency b: refraction c: wavelength d: amplitude (whoever answers correctly first gets brainiest! ) ~kayla

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.)

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f