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Leona [35]
3 years ago
10

Which statements describe magnetic poles? Check all that apply.

Physics
2 answers:
Monica [59]3 years ago
8 0

Answer:

To sum up ^

2, 3, 5

Explanation:

EDG 2020

Alex_Xolod [135]3 years ago
5 0

Explanation:

Magnet: It has two poles: South pole and North pole.

Magnetic field lines are stronger near the poles of the magnet.

Same poles repel each other. There is a magnetic force of repulsion between the same poles. North- North poles repel each other.

Unlike poles attract each other. There is magnetic force of attraction between the opposite poles. South- North poles attract each other.

Mono poles cannot exist.

From the given statements, the magnetic poles are described by:

A north pole must exist with a south pole.

Two south poles placed near each other will repel each other.

A north pole and a south pole placed near each other will attract each other.

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tekilochka [14]

Answer:

The maximum mass that can fall on the mattress without exceeding the maximum compression distance is 16.6 kg

Explanation:

Hi there!

Due to conservation of energy, the potential energy (PE) of the mass at a height of 3.32 m will be transformed into elastic potential energy (EPE) when it falls on the mattress:

PE = EPE

m · g · h = 1/2 k · x²

Where:

m = mass.

g = acceleration due to gravity.

h = height.

k = spring constant.

x = compression distance

The maximum compression distance is 0.1289 m, then, the maximum elastic potential energy will be the following:

EPE =1/2 k · x²

EPE = 1/2 · 65144 N/m · (0.1289 m)² = 541.2 J

Then, using the equation of gravitational potential energy:

PE = m · g · h =  541.2 J

m =  541.2 J/ g · h

m = 541.2 kg · m²/s² / (9.8 m/s² · 3.32 m)

m = 16.6 kg

The maximum mass that can fall on the mattress without exceeding the maximum compression distance is 16.6 kg.

6 0
3 years ago
Natalia lifts a bag of groceries 0.50 m by exerting a force of 36 N. How much work did she do on the bag?
Kruka [31]
<h3><u>Answer;</u></h3>

18 Joules

<h3><u>Explanation;</u></h3>
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Force =36 Newtons

Distance = 0.5 meters

  • Hence; <em>work = 36 N × 0.5 N</em>

<em>                                = 18 Joules </em>

5 0
3 years ago
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yan [13]

The magnitude of the change in momentum of the block between zero and 4. 0 seconds is

dp=1.6m/s

<h3>What is the magnitude of the change in momentum of the block between zero and 4. 0 seconds?</h3>

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x=x+ut+0.5at^2

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1.6=0+0+0.5*a*1^2

a=0.2m/s^2

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dP=mv-mu

2.0*0.8-0

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3 years ago
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A is the correct answer
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Answer:

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