How do you calculate the initial speed given time and displacement?
the question is: the longest kick in cfl history was 83.2m. if the ball remained in the air for 4.12s, determine its initial speed.
i calculated it several times and got the same answer, 40.38m/s, but the textbook says it's 28.6m/s.

Adouble-slit experiment is performed with light of wavelength 600 nm. the bright interference fringes are spaced 1.8 mm apart on the viewing screen. what will the fringe spacing be if the light is changed to a wavelength of 400 nm? ?

Suppose you have a box. which of these is not necessarily a true statement regarding the relationship between the force applied to the box, the work done on the box, and the distance the box is moved? a. if the box is not moved, no force is being applied to the box. b. if no force is applied to the box, no work is done on the box. c. if work is done on the box, then a force is applied to the box. d. if work is done on the box, then the box is moved a distance.

Multiply or divide to make this english distance conversion. 174 inches = feet (14.5, 58, 2,088, 23)