What do gear ratios tell us?

What do gear ratios tell us? A gear ratio is the ratio of the number of rotations of a driver gear to the number of rotations of a driven gear. A colon is often used to show a gear ratio: gear ratio = rotations of a driver gear : rotations of a driven gear. For […]

Can you cut conduit with a hacksaw?

Can you cut conduit with a hacksaw? Rigid pipe can be cut with such PVC pipe and tube cutters as hacksaws, power miter saws and scissor-type cutters, but ratchet-style cutters tend to strike an effective balance of affordability, flexibility and ease of use. With a hacksaw, slowly draw the blade back and forth, making sure […]

How is a shower plumbed?

How is a shower plumbed? The water supply for a shower arrives via two pipes: hot and cold. In construction that is less than 30 years old, these pipes are usually copper. The pipes connect to a shower valve that controls the temperature and flow of water to the shower head. What is needed for […]

Does technology always improve society?

Does technology always improve society? Medical technology is always improving, leading to lower infant mortality, cures for diseases, and many more improvements in quality of life. Mental health and comfort, however, have not improved as technology has advanced. Technology makes us think that it improves our quality of life without actually improving it. How has […]

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