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7nadin3 [17]
3 years ago
13

Why are electromagnets more useful than permanent magnets in many

Physics
2 answers:
Likurg_2 [28]3 years ago
5 0

Answer: Electromagnets can be turned on and off by controlling the current

Explanation:

Tasya [4]3 years ago
5 0

B. By controlling the current, electromagnets can be turned on and off

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A sport car moving at constant speed travels 110m in 5.0 s. if it then brakes and comes to a stop in 4.0 s, what is the magnitud
stiks02 [169]
D = 110 m,  t = 5 s
v o = 110 cs : 5 m = 22 m/s
-------------------------------------
v = v o - a t
v = 0 m/s,  v o =  22 m/s,  t = 4 s
0 = 22 - 4 a
4 a = 22
a = 22 : 4
a = 5.5 m/s²
g = 9.80 m/s²
9.80 : 5.5 = 0.56 
Answer:
The magnitude of its acceleration is 5.5 m/s or 0.56 g. 
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Alanna spots a bird in her back yard. The bird is sitting on a tree. Explain how the outer coverings of the bird and tree are di
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