All categories

4 years ago

Why do you think it would be more practical to use an electromagnet to move scrap metal than to use a permanent magnet?

Physics

1 answer:

Natalija [7]4 years ago

8 0

Answer:

#See solution for details.

Explanation:

-An electromagnet's field can be rapidly changed by just controlling the amount of current. The magnetic strength can be varied over time.

-This way, only a sufficient amount of current will be supplied to meet the needs.

-Unlike the electromagnet, the permanent magnet has a fixed magnetic strength and can only lift a specified weight.

You might be interested in

HELP ASAP PLEASE SCIENCE

shutvik [7]

Answer:

I think it's claim 1 because the same mass would cause them both to either fall off or to stay there

3 0

3 years ago

A 150 g baseball pitched at a speed of 45 m/s is hit straight back to the pitcher at a speed of 60 m/s. What is the magnitude of

abruzzese [7]

Answer:

The average force is 1578.94 N.

Explanation:

Given that,

Mass of baseball = 150 g

Speed = 45 m/s

Speed of pitcher = 60 m/s

Time = 9.5 ms

We need to calculate the average force

Using formula of impulse

$J=\Delta p$

$J=m\Delta v$ ...(I)

$J=F\Delta t$ ....(II)

From equation (I) and (II)

$F=\dfrac{m(v_{f}-v_{i})}{\Delta t}$

Where, m = mass of baseball

$v_{f}$ = final velocity

$v_{i}$ = Initial velocity

$\Delta t$ = time

Put the value into the formula

$F=\dfrac{150\times10^{-3}\times(60-(-40))}{9.5\times10^{-3}}$

$F=1578.94\ N$

Hence, The average force is 1578.94 N.

3 0

4 years ago

Read 2 more answers

What skills are used to move the body from one place to another? *

Anuta_ua [19.1K]

Your muscles, bones, heart and other things in the body.

8 0

3 years ago

Read 2 more answers

You perform a double‑slit experiment in order to measure the wavelength of the new laser that you received for your birthday. Yo

Vitek1552 [10]

Answer:

λ = 5.734 x 10⁻⁷ m = 573.4 nm

Explanation:

The formula of the Young's Double Slit experiment is given as follows:

$\Delta x = \frac{\lambda L}{d}\\\\\lambda = \frac{\Delta x d}{L}$

where,

λ = wavelength = ?

L = distance between screen and slits = 8.61 m

d = slit spacing = 1.09 mm = 0.00109 m

Δx = distance between consecutive bright fringes = $\frac{4.53\ cm}{10}$ = 0.00453 m

Therefore,

$\lambda = \frac{(0.00453\ m)(0.00109\ m)}{8.61\ m}$

6 0

3 years ago

A 426.7 Hz tuning fork is resonating in a closed tube on a warm day when the speed of sound is 346 m/s.

Grace [21]

Answer:0.8 meter

Explanation:

Frequency=426.7hz

Velocity=346m/s

Length =velocity ➗ frequency

Length=346 ➗ 426.7

Length =0.8

8 0

3 years ago