A convex mirror in a hardware store has a focal length of -0.5m. An elf who is 1.5m tall is standing 4.0m in front of the mirror. Calculate the image distance. 1/f = 1/di + 1/do

28. a stone is projected at a cliff of height h with an initial speed of 42.0 mls directed at angle θ0 = 60.0° above the horizontal. the stone strikes at a, 5.50 s after launching. find (a) the height h of the cliff, (b) the speed of the stone just before impact at a, and (c) the maximum height h reached above the grou

Aseries circuit consists of a resistor with r = 20 ? , a capacitor with c = 0.01 f, and a decaying battery with e = 300e? 5t. if the initial charge is 0, find the charge as a function of time t

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?