Little Passports Science Kit and Book
* PRESSURE POWER *
NEW & SEALED ** Ages 8 and up
Released 2020 * Hydraulic and pneumatic systems don’t add energy to what’s already there.
They just transform one kind of energy into another. In the case of hydraulics, the compression of liquids, like water or oil, provides energy for machines. For pneumatics, the power of compressed gases provides the energy.
Hydraulic systems work under higher pressures than pneumatic systems, so they need to be tougher, heavier, and more durable.
Thank you and God Bless from,
Joann & Mark
We have been married for 51 years, and both retired.
Selling items in an effort to down-size after years of shopping, amazing how much you can collect over the years kind of sneaks up on you!
Member of eBay for 21 plus years
Non-Smoking Household - No Pets
We do not ship outside the USA