Which tool has a greater mechanical advantage, and why? OA. The lopper, because its longer handles can produce more output
O B. The lopper, because the input work is the same as the output work
C. The hand shears, because you can apply less total force to the
force with less input force
handles with one hand
OD. The hand shears, because their shorter handles transfer force
more quickly to the cutting blade

Consider a one meter long horizontal pipe with a constant 100 cm^2 cross sectional area. water flows rightward into the pipe at x = 0 with flow velocity 02m/sec at every point within the pipe intake area. at x=1, the rightward flow rate is 0.192 m/sec. assume the water is a conserved quantity in the pipe, so there must be a leak (a sink) somewhere in the pipe. 1. compute net volumetric flow of the source if the system to be in equilibrium. 2. now assume the pipe in the problem has no leaks. compute the net volumetric rate of change for the system.

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j

Could we see a galaxy that is 20 billion light-years away?