Estimate the amount of copy or printing paper that you use every year. A 500-sheet ream of copy paper has an approximate mass of 5 pounds (2.27 kg). How much of this consumption is truly necessary, and how much of your own paper consumption could be avoided? State your assumptions.
What will be an ideal response?
For example, on average, I use 15 pages per day; then on a yearly basis, I use 5475 pages (15 x 365).
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Two students want to measure the acceleration a of a cart rolling down an inclined plane. The cart starts at rest and travels a distance s down the plane. The first student estimates the acceleration by measuring the instantaneous velocity v just as the cart has traveled s meters, and uses the formula 
The second student estimates the acceleration by measuring the time, in seconds, that the cart takes to travel s meters, and uses the formula 
. Assume that s=1 m, and that there is negligible uncertainty in s. Assume that v=3.2 ± 0.1 m/s and that t=0.63 ± 0.01 s. Assume that the measurements of v and t are independent.
a. Compute the acceleration using the method of the first student. Call this estimate 
. Find the uncertainty in .
b. Compute the acceleration using the method of the second student. Call this estimate 
. Find the uncertainty in .
c. Find the weighted average of 
and 
that has the smallest uncertainty. Find the uncertainty in this weighted average.
A? flex-fuel vehicle can be identified by? ________.
A) VECI
B) Emblems on the side, front, and/or rear of the vehicle
C) VIN
D) Any of the above
A voltmeter was used to check the coolant and a reading of 0.2 volt with the engine off was measured. A reading of 0.8 volt was measured with the engine running and all electrical accessories turned on. Technician A says that the coolant should be flushed to solve the galvanic activity. Technician B says that the ground wires and connections should be inspected and repaired to solve the electrolysis problem. Which technician is? correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
DEX-COOL coolant is composed mostly of which of these chemicals?
A) Ethylene glycol B) Propylene glycol C) Methanol D) Alcohol