A screwdriver is used to loosen a screw nail. The radius of the handler is 4.0 cm. The nail puts the force at 0.2 cm from the axis. The picture is shown. You apply 10 N force to loosen the nail. How much force does the nail apply to the screwdriver?

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

Ahair dryer is basically a duct in which a few layers of electric resistors are placed. a small fan pulls the air in and forces it through the resistors where it is heated. air enters a 1200 w hair dryer at 100 kpa and 22°c and leaves at 47°c. the cross-sectional area of the hair dryer at the exit is 60 cm2. neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.

Are formed where bumps from two surfaces come into contact ?