7. Define Efficiency in words. How efficient are cars compared to bicycles, why do you think bicycles are more
efficient? (Hint: Explain using the wasted energy in each case)
8. A food blender takes in 300J of electrical energy gives out only 100J of mechanical energy.
a. Explain how energy transforms in a food blender and the kinds of energy that are wasted (unusable).

If jesus walked on water, does that mean he swims on land

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.