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3 years ago

8

How does the magnetic force exerted by a magnet change as the distance between two magnets increases

1 answer:

elena-14-01-66 [18.8K]3 years ago

7 0

As the distance between two magnets increases, the force between them <em>decreases</em>.

If the force increased along with distance, then the magnet in your hand would reach out
and grab every magnet in Australia or on Mars and pull it toward you.

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Pls help waves for physics

djverab [1.8K]

Answer:

b) 252 Hz or 260 Hz

c) 0.25 s

Explanation:

b) The frequency of the beats is 4 Hz, and one tuning fork has a frequency of 256 Hz. Therefore, the second tuning fork is either 4 Hz lower or 4 Hz higher.

f = 252 Hz or 260 Hz

c) Period is the inverse of frequency.

T = 1/f

T = 1 / (4 Hz)

T = 0.25 s

8 0

3 years ago

Which of the following was not first proposed by Charles Darwin?

ira [324]

Answer:

C. Struggle for existence

Explanation:

Have a great day

6 0

3 years ago

Type of electromagnetic radiation is used to kills cancer cells

notka56 [123]

B. gamma rays, is right.

3 0

3 years ago

A student holds an egg outside of an open window and let's go. The window is 40 meters above the ground and the egg is falling u

melisa1 [442]

The distance traveled by the egg after 2 seconds is 19.6 m.

The given parameters:

<em>Height of the window, h = 40 m</em>

The distance traveled by the egg after 2 seconds is calculated as follows;

$h = v_0_y t + \frac{1}{2} gt^2\\\\$

where;

<em /> $v_0_y$ <em> is the initial vertical velocity of the egg = 0</em>
<em>g </em><em>is acceleration due to gravity = 9.8 m/s²</em>
<em>t </em><em>is the time of motion, = 2 s</em>

$h = 0 \ + \ \frac{1}{2} \times 9.8 \times (2)^2\\\\h = 19.6 \ m$

Thus, the distance traveled by the egg after 2 seconds is 19.6 m.

Learn more about second equation of motion here: brainly.com/question/7977693

5 0

3 years ago

A surveyor measures the distance across a straight river by the following method: Starting directly across from a tree on the op

VikaD [51]

Answer:

W = 85.73 m

Explanation:

given,

surveyor walks = 118 m

makes an angle of = 36.0° with the tree

to find the width of the river

$tan \theta = \dfrac{W}{distance}$

$tan 36^0 = \dfrac{W}{118}$

$tan 36^0 = \dfrac{W}{118}$

$W = 118 \times 0.7265$

W = 85.73 m

hence, the width of the river is equal to W = 85.73 m

3 0

3 years ago