How many significant digits are in the measurement 143,000

How to understand Planck law?

The pump of a water distribution system is powered by a 20-kW electric motor whose efficiency is 90%. The water flow rate through the pump is 40 L/s.

Which of the following is the transfer of energy as heat by the movement of a liquid or gas? O conduction convection emission radiation

What led kepler to abandon circular orbits and his discovery that planetary orbits are ellipses?

As a wave moves through a medium, particles are displaced and return to their normal position after the wave passes. remain in the new location after the wave passes. are combined with other particles forming the wave.

When the volume increased, what happened to the density?

8. Chemical weathering occurs more rapidly in what kind of climates? A. Desertlike B. Cold with high snowfall amounts C. Cool and dry D. Warm with abundant rainfall

Recoil is noticeable if we throw a heavy ball while standing on a skateboard. If instead we go through the throwing motion but hold onto the ball, without friction effects our net recoil will be A) zero. B) the same as before.

If an electromagnet is used to pick up nails and other metal objects, what happens when the current is turned off?

An electron enters a region of uniform perpendicular en and bn fields. it is observed that thevelocity nv of the electron is unaffected. a possible explanation is: