The energy required to increase the speed of a certain car from 19 m/s

The position of a dragonfly that is flying parallel to the ground is given as a function of time by r⃗ =[2.90m+(0.0900m/s2)t2]i^− (0.0150m/s3)t3j^. a: at what value of t does the velocity vector of the insect make an angle of 34.0 degree clockwise from the x-axis? b: at the time calculated in part (a), what is the magnitude of the acceleration vector of the insect? c : at the time calculated in part (a), what is the direction of the acceleration vector of the insect?

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

To create electromagnetic induction, which of the following has to move? a. a wire b. a magnet c. a transformer d. either a or b