The kingdom Animalia is divided into ____ phyla according to the animals' characteristics
a. 27 c. 17
b. 47 d. 20
A
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From a fixed point on the ground, the distance to a certain tree is measured to be s = 55.2 ± 0.1 m and the angle from the point to the top of the tree is measured to be ? = 0.50 ± 0.02 radians. The height of the tree is given by h = s tan ?.
a. Estimate h, and find the uncertainty in the estimate. b. Which would provide a greater reduction in the uncertainty in h: reducing the uncertainty in s to 0.05 m or reducing the uncertainty in ? to 0.01 radians
Which of the following statements apply to CMOS devices?
A) The devices should be stored and shipped in antistatic tubes or conductive foam. B) All tools, test equipment and metal workbenches should be tied to earth ground. C) The devices should not be inserted into circuits with the power on. D) All of the above are correct.
The type of cut that is made to a rafter so it will rest squarely on the top plate is the _____
a. notch b. bird?s mouth c. sill cut d. joist cut
Which of the following is an 802.15.4-based technology that implements IPv6 on WPANs and supports mesh networking?
A. WiGig B. UWB C. 6LoWPAN D. WirelessHART