what do we know about balls? what do we want to find out? do all balls bounce?| do all balls roll? what makes balls roll?
if you pull down on a mass that hangs from a spring, it will bounce up and down for a while before stopping. Why does the mass bounce?
A tennis player hits a 1.45 kg tennis ball with a racket of mass 2.5 kg. If he hits the ball with a velocity of 7.5 m/s and then stops, what impulse did he imply on the ball? What is the ball’s velocity?
Answer these, and tell me HOW you got to the answer.Thanks27) The connections between neurons in the retina, specifically the connections referred to as “lateral inhibition,” help us see which of the following better?ContrastFacesColors45) Improving the contrast of an image (making the dark regions darker and the light regions lighter) helps us to identify:The edges of objectsThe center of objectsThe color of an object67What assumption does our visual system make in order to see curved surfaces (domes, holes)?Light comes from aboveCurved surfaces are always evenly litCurved surfaces are always easy to see, no assumptions are made78) Which part of the face does our brain pay the most attention to?Eyes and mouthEyes and earsEyes and chin88) If all these assumptions sometimes lead to mistakes, for example in these optical illusions, why do we make them?It helps us see things fasterIt helps us see things correctlyIt helps us pay attention to what's importantAll of the above
Why don't the noble gases form compounds readily? A.they have empty outer energy levels B.they have no electrons C.they have seen electron in the outer energy level D.their outer energy level are completely filled with electrons
