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2 years ago

12

What is an electromagnet? A. a solenoid with a ferromagnetic core B. a magnet that's electrically pulsed C. a solenoid with no c

ore D. All of the above E. none of the above

1 answer:

Nina [5.8K]2 years ago

3 0

D because not one of the has one of the things tha it can show

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A 600-g block is dropped onto a relaxed vertical spring that has a spring constant k =190.0 N/m. The block becomes attached to t

charle [14.2K]

Answer:

Work done will be 2.205 j

Explanation:

We have given that the spring is compressed b 37.5 cm

So d = 0.375 m

Mass of the block m = 600 gram = 0.6 kg

Acceleration due to gravity $g=9.8m/sec^2$

Gravitational force on the block $F=mg=0.6\times 9.8=5.88N$

Now we know that work done is give by $W=Fd=5.88\times 0.375=2.205J$

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3 years ago

What phase difference between two otherwise identical harmonic waves, moving in the same direction along a stretched string, wil

lora16 [44]

Answer:

$\theta=145$

Explanation:

The amplitude of he combined wave is:

$B=2Acos(\theta/2)\\$

A, is the amplitude from the identical harmonic waves

B, is the amplitude of the resultant wave

θ, is the phase, between the waves

The amplitude of the combined wave must be 0.6A:

$0.6A=2Acos(\theta/2)\\ cos(\theta/2)=0.3\\\theta/2=72.5\\\theta=145$

5 0

2 years ago

Can you answer the question

Dominik [7]

Can u show the whole question plz

3 0

2 years ago

Boron (B) has an atomic number of 5 and an atomic mass of 11. Boron has _____.

Neko [114]

Answer:

the answer is 5 electrons

Explanation:

because its the same name as the amount of protons

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2 years ago

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What is potential energy?

iVinArrow [24]

energy associate with position or shape

5 0

3 years ago