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Ierofanga [76]
3 years ago
13

Juanita made an electromagnet by placing an iron bar inside a coil of wire and then running current through the wire. After awhi

le, she turned off the current. What happened to the bar?
A The bar continued to be magnetic forever.

B The bar’s magnetism became weaker over a long time.

C The bar remained magnetic, but only at the poles.

D The bar immediately lost its magnetism.
Physics
1 answer:
swat323 years ago
5 0

Answer: Correct Ans is B

Explanation:

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Blood plasma volume for adults is about 3.1 liters. It has a density of 1.020 gml. How many pounds of blood plasma are in your b
kari74 [83]

Answer:

mass is 6.97 pounds

Explanation:

given data

volume = 3.1 liters

density = 1.020 g/ml = 1.02 kg/l

to find out

How many pounds of blood plasma

solution

we know mass formula from density that is

density = mass / volume

so

mass = density × volume    ...............1

so put all value to get mass

mass = 1.02 × 3.1

mass = 3.162 kg

mass = 3.162  × 2.205 pounds

so mass is 6.97 pounds

6 0
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You pull a block of mass m across across a frictionless table with a constant force. you also pull with an equal constant force
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For any mass m:

a = F/m
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SO
Both will have same energy
The larger mass will have greater momentum
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3 years ago
Steve does 80 J of work to a rope threaded through a pulley and attached to a crate of anvils. The tension of the rope is 10 N a
Ivahew [28]

Answer:

The Answer is (B)

Explanation:

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Denise is conducting a physics experiment to measure the acceleration of a falling object when it slows down and comes to a stop
Butoxors [25]

Answer:

D!

Explanation:

Using the formula F = ma, you plug in 4.9 for F (force), and 0.5 for m (mass), then solve for a (acceleration).

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TRUE OR FALSE- Doing sports activities as your Cardio Training can be just as effective or more effective than running on a trea
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its true

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