supposed to vacuum cleaner uses 120 J of electrical energy. If 45 J used to pull air into a vacuum cleaner, how efficient is the vacuum cleaner?

What is the solution in the scientific process called? A. Research B. Hypothesis C. Conclusion D. Data

Which book has kinetic energy? A book on a teacher's table A book in a students locker A book lying on a shelf in the library A book falling from a backpack

1. the coastlines of continents fitting together like puzzle pieces was one of the four pieces of evidence for continental drift. true or false? 2. why was wegners theory of continental drift not accepted by the scientific community? a.

Consider two sizes of disk, both of mass M. One size of disk has radius R; the other has radius 2R. System A consists of two of the larger disks rigidly connected to each other with a common axis of rotation.

The power (in watts) used to move air in or out of the lungs is equal to the pressure (in N/m2) multiplied by the flow rate (In m3/s).

When you throw a ball the work you do to accelerate it equals the kinetic energy the ball gains?

Old-fashioned heating systems sent steam into radiators in each room of a house. in the radiators, the steam condensed back to water. analyze this process and explain how it heated a room.

If a space ship is traveling with a constant acceleration of 75 m/s^2 and travels for three weeks, how far did it travel and what was it's velocity before it stopped?

How could you change your track to maximize the kinetic energy of the skater? Explain?

3. However, until 2002, these three countries used different A. currents B. undercurrent C. currencies D. currency E. crosscurrent F. current G. currently