Answer:
The correct answer is from Tech B.
Explanation:
The relay is an electromagnetic device, which is stimulated by a very weak electrical current to open or close a circuit. It functions as a switch controlled by an electrical circuit in which, by means of a coil and an electromagnet, a sequence of one or several contactors is activated that allow to open or close other electrical circuits independent of the one that controls it.
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The 175 N force is in the path A to B since a stick can’t pull the doorknob, this can be written as:
(F ) ⃗= 175⋅(73i ⃗+990 j ⃗+494 k ⃗)/(√73² +990²+ 494²
)
(F ) ⃗=(11.5i ⃗+156 j ⃗+78.0k ⃗ )N
The displacement form C to B is:
(r ⃗ )_(B/C)=(683 i ⃗+860 j ⃗+0k ⃗ )mm
The formula for the moment about C is
M ⃗_c= (r ⃗ )_(B/C) x (F ) ⃗
M ⃗_c= (683 i ⃗+860 j ⃗ ) x (683 i ⃗+860 j ⃗+0k ⃗ )mm.N
M ⃗_c= (67.1 i ⃗+53.3 j ⃗+116 k ⃗ )m.N
Answer:
1144.8
Explanation:
1 meter per second is equal to 3.6 kilometers per hour
W=MG
w is weight
m is mass
g is gravity
W=(100 kg)(9.8 m/s)
W= 980 N
hope this helps
Answer:
2600 m
Explanation:
A fathometer produces a sound wave and then detects the echo. It takes 3.5 seconds for the echo to reach the ship, so that means it takes half the time (1.75 seconds) to reach the ocean floor.
The speed of sound in seawater is approximately 1500 m/s, so the depth of the ocean at that point is:
d = 1500 m/s × 1.75 s
d = 2625 m
Rounding to two significant figures, the depth is approximately 2600 m.
