Full explanation please I’m asking kindly 1. Thé speed of sound is 331 m/s. How much time will it take for the sound from a fire work explosion to travel 1 kilometer?
(Note: 1 km= 1000 meters)

2. An object that is originally moving at speed at 20 m/s accelerates uniformly for 5.0 seconds to a final speed of 50m/s. Calculate the acceleration of the object

Steam is generated in a boiler of a cogeneration plant at 10 mpa and 450°c at a steady rate of 5 kg/s. in normal operation, steam expands in a turbine to a pressure of 0.5 mpa and is then routed to the process heater, where it supplies the process heat. steam leaves the process heater as a saturated liquid and is pumped to the boiler pressure. in this mode, no steam passes through a condenser, which operates at 20 kpa. (a) determine the power produced in the turbine and the rate at which process heat is supplied in this mode. (b) determine the power produced in the turbine and the rate of process heat supplied if only 60 percent of the steam is routed to the process heater and the remainder is expanded to the condenser pressure. (3.32 mw; 9.69 mw; 4.25 mw; 5.82 mw)

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

If the specific heat of a metal is 0.850 j/g °c, what is its atomic weight?