The components of polyester are _________toxic than epoxy.
Fill in the blank(s) with the appropriate word(s).
less
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Camera #1 has a lens of diameter 2.0 cm with a focal length of 5.0 cm, camera #2 has a lens of diameter 1.5 cm with a focal length of 4.5 cm, and camera #3 has a lens of diameter 1.1 cm with a focal length of 3.3 cm. Assuming all the cameras use the same type film and have a shutter speed of 1/200 s, which camera can give the best exposure at the lowest light level?
1.#3 2.#2 3.#2 and #3 are both equal and better than #1. 4.#1
Force on a Wire: A straight wire carries a current of 10 A at an angle of 30° with respect to the direction of a uniform 0.30-T magnetic field. Find the magnitude of the magnetic force on a 0.50-m length of the wire.
A. 0.75 N B. 1.5 N C. 3.0 N D. 6.0 N
On the H-R diagram, most bright naked eye stars would lie at the ________
Fill in the blank(s) with correct word
What is the equivalent resistance between points a and b when R = 12 ??
A. 20 ? B. 16 ? C. 24 ? D. 28 ? E. 6.0 ?