A student moves a horseshoe magnet by hand across a tabletop to varying distances from an electromagnet, as shown in the diagram
above.
The student records observations of how much force it takes to hold the horseshoe magnet in place at each distance. Observations
• 20 cm: no force required
• 10 cm: small force required; easy to hold in place
• 5 cm: large force required; very difficult to hold in place
What do the student's observations demonstrate?
A. The electromagnet's magnetic field becomes stronger as more magnetic material is added to it.
B. The electromagnet's magnetic field is stronger as more turns are added to the wire on the nail.
C. The electromagnet's magnetic field becomes stronger as a small amount of strength is added to the system by the battery.
D. The electromagnet's magnetic field is stronger close to it than far from it.
The student records observations of how much force it takes to hold the horseshoe magnet in place at each distance. Observations
• 20 cm: no force required
• 10 cm: small force required; easy to hold in place
• 5 cm: large force required; very difficult to hold in place
What do the student's observations demonstrate?
A. The electromagnet's magnetic field becomes stronger as more magnetic material is added to it.
B. The electromagnet's magnetic field is stronger as more turns are added to the wire on the nail.
C. The electromagnet's magnetic field becomes stronger as a small amount of strength is added to the system by the battery.
D. The electromagnet's magnetic field is stronger close to it than far from it.
2 answers:
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Answer:
f = 347.08 N
Explanation:
The frictional force exerted by the floor on the refrigerator is given as follows:
where,
f = frictional force = ?
μ = coefficient of static friction = 0.58
W = Weight of refrigerator = mg
m = mass of refrigerator = 61 kg
g = acceleration due to gravity = 9.81 m/s²
Therefore,
<u>f = 347.08 N</u>
Answer: The first one
Explanation: My best guess is in the pic attached. Hope this helps.
