. A hammer of mass 200g is dropped from the top of the roof of a two-storey building to the ground. Another hammer of equal mass fell from the coffee table to the ground. Given that the height of the two-storey building, and the coffee table are 10 m and 1.2m respectively. Show that a hammer dropped from two store building roof does more work than a hammer falling from a coffee table. ​

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

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.

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these