HELPPP Which of the following regarding speed and velocity is true?
A. Velocity includes both magnitude and direction
B. Speed includes magnitude and direction
C. Both speed and velocity include magnitude and direction; they measure the same thing
D. Velocity includes magnitude but not direction

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?

Juan created a chart to him study for a test. which headings best complete the chart? x: transparent objects y: opaque objects x: opaque objects y: transparent objects x: high frequency waves y: low frequency waves x: low frequency waves y: high frequency waves

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above