What should a free-body diagram look like for a skydiver that is still speeding up as he falls? there is an arrow up for air resistance and an arrow down for gravity. the arrows are the same length. there is an arrow up for air resistance and an arrow down for gravity. the arrow up is longer than the arrow down. there is an arrow up for air resistance and an arrow down for gravity. the arrow up is shorter than the arrow down. there is only an arrow down for gravity. ~

Consider the following position function. find (a) the velocity and the speed of the object and (b) the acceleration of the object. bold r left parenthesis t right parenthesisr(t)equals=left angle 6 t superscript 4 baseline comma 2 t cubed right angle6t4,2t3 for tgreater than or equals≥0

He latent heat of vaporization for ethyl alcohol is 854 j/g. the amount of energy, rounded to the nearest whole number, needed to change 5.20 grams of ethyl alcohol from a liquid to a gas is

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.