ASAP!!! What is the purpose of a heavy stream appliance?

provides breathable air from attached air tanks

focuses the fluid flow into a heavier stream

moves or removes smoke and gases from buildings and passageways

removes citizens from burning or hazardous structures

The starship enterprise is caught in a time warp and spock is forced to use the primitive techniques of the 20th century to determine the specific heat capacity of an unknown mineral. the 125-g sample was heated to 96.3°c and placed into a calorimeter containing 85.9 g of water at 20.0°c. the heat capacity of the calorimeter was 14.2 j/k. the final temperature in the calorimeter was 24.5°c. what is the specific heat capacity (in j/g°c) of the mineral? enter to 4 decimal places.

If frequency goes up, what happens to wavelength? does it get shorter or longer?

5m/swhenhereaches and even steeper slope. if he accelerates at 2 m/s2 for the 5 m slope, how fast is he traveling when he reaches the bottom of the 5 m slope?