× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
t
7
m
6
k
6
F
5
j
5
t
5
j
5
G
5
f
5
a
5
d
5
c
5
New Topic  
huhs huhs
wrote...
Posts: 799
Rep: 0 0
6 years ago
A frangible bulb heat detector is activated when:
 
  A. a beam of light is reflected onto a photoelectric cell to complete a circuit.
  B. ionized molecules make air less conductive, causing a decrease in current.
  C. a chemical pellet melts, releasing a pressurized plunger to complete a circuit.
  D. a small glass vial breaks when heated, allowing electrical contacts to complete a circuit.
Read 32 times
1 Reply

Related Topics

Replies
isa
wrote...
6 years ago
D
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  1000 People Browsing
Related Images
  
 736
  
 6897
  
 247
Your Opinion
Which country would you like to visit for its food?
Votes: 214

Previous poll results: What's your favorite math subject?