6. If Kevin is on a skate board and pushes off of a wall with a force of 100 N, what should happen?
(10 Points)
the wall should be pushed back by Kevin
the wall should push back on Kevin with more force
the wall should push back on Kevin with the same force
the wall should push back on Kevin with less force

Which type of electromagnetic waves are dangerous enough to be used to kill cancerous cells? (a)gamma rays (b)visible light (c)infrared light (d)microwaves

which statements describe the image? check all that apply. the wood is releasing argon gas. this information is useful for dating ancient rock. the process works only with organic matter. the element has a half-life of 5,730 years. this shows the half-life of carbon-19.

12. ritu obtained a distinct image of a distant tree on the screen with the of a concave mirror. to find the focal length of the mirror she has to measure the distance between: (a) mirror and the tree. (b) screen and the tree.(c) mirror and the screen. (d) mirror and tree as well as between screen and the tree.