Abicyclist is in a 50-km race. she says she had an average velocity of 35. what is missing in the cyclist's velocity?   a. units only   b. units and distance   c. direction only   d. units and direction

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

The base of a 50-meter tower is at the origin; the base of a 50-meter tree is at (0, 50, 0). the ground is flat and the z-axis points upward. the following parametric equations describe the motion of six projectiles each launched at time t = 0 in seconds. (i) r (t) = (50 + t2)k (ii) r (t) = 2t2 j + 2t2k (iii) r (t) = 50 i + 50 j + (50 − t2)k (iv) r (t) = 2t j + (50 − t2)k (v) r (t) = (50 − 2t) i + 2t j + (50 − t)k (vi) r (t) = t i + t j + tk (a) which projectile is launched from the top of the tower and goes downward? at time t = , the projectile hits the ground at point (x, y, z) = . (b) which projectile hits the top of the tree?

You have 80 g of 60oc water and 80 g or 10oc water. what is the final temperature when the two are mixed? explain.