The density of water at 20°C is 0.9982 × 103 kg/m3. (a) What is the density when thetemperature is 22°C? (b) What is the percent change in density? (c) If 23 of water at 20°C iskept in a container with a cross sectional area of 0.5 2, how much will the water level increasewhen the temperature increases from 20°C to 22°C? (Assume that water expands uniformlyover this temperature change – one of the main reasons of sea level rise with globalwarming is due to the fact that warmer oceans occupies more space

Observations show that interstellar clouds can have almost any shape and

The particles that are found in the nucleus of an atom are

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?