In flocabulary The liquid mantle is constantly churning in movements called convection currents. Convection is a method of heat transfer in which hot liquid rises and cooler liquid sinks in a continuous cycle. The large pieces of Earth’s crust are always moving above the mantle. People cannot feel these movements because they are very slow. They move at about the speed that fingernails grow, or a couple of inches per year. Over long periods of time, convection currents create cracks in the Earth’s tectonic plates. These cracks are called faults. witch one is correct
A it is solid and does not move
B It moves quickly and unpredictably.
C It moves in very slow currents
D It can suddenly cause huge fault lines

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

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?