Quick physics questions! will give
which of these is the best example of an elastic collision?
a rubber ball is dropped from 1.2 m and bounces back up to a height of 0.8 m.

a billiard ball strikes another of the same mass at rest and stops, and the second ball then moves with the same velocity as the first ball.

a cart rams a similar cart and latches onto it with a loud clack.

a cart rams another with a compressed spring, which is released, pushing them apart.
two objects, a and b, each of mass 0.22 kg, are moving at 0.52 m/s directly toward each other. a completely inelastic collision occurs and both objects stop. what percentage of the total kinetic energy is changed into other forms of energy?

In a steady-flow steam power plant system, two adiabatic high-pressure and low-pressure turbines ane used to generate power. superheated steam enters the high-pressure turbine at 8 mpa and 550°c. the steam expands in the high-pressure turbine to a saturated vapor at 3 mpa. in order to increase the powe generation of the power plant, another steam turbine working in a lower pressure ranges is deployed. the outlet vapor from the first turbine is heated up at a boiler to the temperature of 500 c at the constant pressure of first turbine's outlet (3 mpa). then, the vapor enters the second turbine and produces extra work. the exit conditions of the second turbine are 5o kpa and 90 percent quality. if the total power output of the power plant is 25 mw, determine a) the mass flow rate of the water (kg/s). b) heat transfer rate in the boiler (mw). (30 points) 3 mpa 00 c 8 mpa s0 c high pres turbine low pres boiler turbine 50 kpa 3 mpa 09 saturated vapor t heat engine, shown in the figure, operates between high temperature and low temperature of through a heat 4. a carnot tn and tu respectively. this heat engine receives energy from a heat reservoir at t exchanger where the heat transferred is proportional to the temperature difference as ? = k (z,-7, ). it rejects heat at a given low temperature tl. to design the heat engine for maximum work output, find the high temperature, th, as a function of tes and t. (15 points) qe

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?