This question is about pressure.
Explain why a medical syringe has a wide, flat plunger end for the thumb to press on and an extremely sharp, fine needle tip at the other end, allowing it to easily pierce skin.
Small pressurized helium cylinders are used to inflate party balloons.
Using ideas about particles, explain why the pressure in the cylinder decreases as the helium is released to inflate the balloons.
A cylinder supplies 8000 cm38000\text{ cm}^38000 cm3 of helium at a pressure of 3000 kPa3000\text{ kPa}3000 kPa. The volume of each balloon is 5100 cm35100\text{ cm}^35100 cm3. The pressure exerted by the helium inside each inflated balloon is 150 kPa150\text{ kPa}150 kPa. Calculate how many balloons can be fully inflated using the helium from the cylinder. [Assume the temperature of the helium remains constant]