I hockey puck slides across an ice rink more easily than it does across a rough concrete surface why is this

If the mass of the block is too large and the block is too close to the left end of the bar (near string B) then the horizontal bar may become unstable (i. e., the bar may no longer remain horizontal).

A compass is a magnet and Earth is a magnet. How does the magnetism of a compass work with the magnetism of Earth so that a compass is a useful tool for navigating?

A cylinder with a moving piston expands from an initial volume of 0.150 L against an external pressure of 1.50 atm. The expansion does 217 J of work on the surroundings. What is the final volume of the cylinder

What are some technologies used by designers of prosthetic legs to improve their designs?

2) If the centripetal force on an object in uniform circular motion is increased, what is the effect on (a) the frequency of rotation f (with r constant) and (b) f and r when both are free to vary

How many moles of phosphorus trichloride are in 200 grams of the molecule? 62.67 mol 27,466.6 mol 1.46 mol 0.69 mol

A starship passes Earth at 80% of the speed of light and sends a drone ship forward at half the speed of light rela - tive to itself. Show that the drone travels at 93% of the speed of light relative to Earth.

Rubies are used in electronics

Two kids are on a merry-go-round that is turning at a constant rate. ariel is near the outer edge, and bob is closer to the center. ariel has answer (smaller, the same, or greater angular speed?

Visit this website and locate the element mercury, whose chemical symbol is Hg. Click on the square to read about the history, properties, and uses of mercury. Name three uses for mercury.