I think you mean "perforated" baffles. The baffles provide a surface area to collect any entrained water in the steam. The perforations are simply holes to let the steam pass through. The velocity of the steam is relatively low in this section, preventing the water from being re-entrained from the wet surfaces of the baffles.
The paper rotates on a drum under the pen while the pen moves across the drum.
Drums work when you hit the drumhead with the drumstick. Thus causing the drumhead to vibrate. The vibration passes through the air hole which causes the drum to be louder. If you'd cover up the air hole the drum is very quiet. Drum can work without a head on the bottom of the drum however this changes the sound of the drum. Some people like that sound. Some don't, I personally do not.
It's called 'Bang on the Drum All Day' (obviously) and it's by Todd Rundgren.
A snare drum works by having these small bead like things on the bottom and when you hit it with a drum stick it rattles and it gets the sound it does when you hear it
They are played with the hands.
Steam boilers work by boiling water to generate steam. The steam then is used to heat the engine.
you hit your bum violently on a drum. no specific drum is required.
hit it
The paper rotates on a drum under the pen while the pen moves across the drum.
steam is water
repelsteeltje
The baffles in slip-on mufflers do more than just reduce noise; they also work to create a backpressure that helps to evacuate the combustion chamber of exhaust gases. Removing them will have a negative effect.
Water is heated to produce steam. The steam is used to power the engine. The power from the engine does the work or powers other instruments that do the work.
Water is heated to produce steam. The steam is used to power the engine. The power from the engine does the work or powers other instruments that do the work.
Yes.
Locomotive work by steam engines.
the steam engine was quicker and stronger than hoses