Suppose neutrinos are detected on earth using a 20,000-kg detector of100mo that transform ve's to electrons via the reaction ve + 10°m0 -» e 100tc. does the number of detected events per unit time depend on the area, a, covered by the detector? a. yes: number detected proportional to a* b. yes: number detected proportional to a3. c. yes: number detected proportional to a2. d. yes: number detected proportional to a (e. no: number detected independent on a

Describe cytokinesis in plants and animals. in animals: in plants.

Which best describes the difference between internal and thermal energy?

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?