On his way to class, a student on a skateboard is accelerating on a downhill stretch. Which of the following statements is true? (Select all that apply.) A. The skateboarder's acceleration is perpendicular to the net force.
B. The skateboarder is moving in the direction of the net force.
C. The skateboarder's acceleration is in the direction of the net force.
D. The skateboarder is subjected to a net external force in the direction of motion.

What happens to atoms and chemical bonds during a reaction?

The intensity of a polarized electromagnetic wave is 12 w/m^2. part a) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=0∘ with the plane of polarization? part b) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=30∘ with the plane of polarization? part c) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=45∘ with the plane of polarization? part d) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=60∘ with the plane of polarization? part e) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=90∘ with the plane of polarization?

Which of the following is not a means to accelerating? question 4 options: a)increase speed b)remain still c)decrease speed d)change direction