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3 years ago

Which property describes an electromagnetic wave and not a mechanical wave?

Physics

1 answer:

Andrews [41]3 years ago

4 0

B. Travels in a Vacuum.

Electromagnetic have the ability to travel in a vacuum unlike mechanical wave.

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Which part of earths surface has the greatest rotational speed

Anni [7]

Every point on the surface must have the same rotational speed.
Otherwise some places would rotate away from other places.

If the next block of your city rotated faster than the block that you live on,
then you could sit at home, look out the window, and watch your school
rotate past your house.

The map of the continents on the Earth would change constantly.

6 0

3 years ago

Two electrons are passing 20.0 mm apart. What is the electric repulsive force that they exert on each other

vladimir1956 [14]

15.0 I’m pretty sure that’s the answer to your question

4 0

2 years ago

Read 2 more answers

The sensor in the torso of a crash test dummy records the magnitude znd direction of the net force acting on the dummy.If the du

patriot [66]

Answer : The force will be 4501.9

We can see that, two forces acting on the dummy in two different direction.

We know that, here two forces are given in perpendicular direction with each other.

We know the force is the vector addition law so, we will use the Pythagoras theorem for the resultant of the vectors

Now, the net force is

$F_{net} = \sqrt{{F_{1}}^{2}+ {F_{2}}^{2}}$

Two forces is given,

$F_{1} = 130.0 N$

$F_{2} = 4500.0 N$

Now, the net force is

$F_{net} = \sqrt{(130)^{2}+ (4500)^{2}}N$

$F_{net} = \sqrt{20266900}N$

$F_{net} = 4501.9 N$

Hence, the force will 4501.9 N

8 0

3 years ago

Read 2 more answers

"Find the change in gravitational potential energy that the box undergoes as it rises to its final height."

Alekssandra [29.7K]

Explanation:

Given that,

Mass of a box is 2.6 kg

(1) We need to find the work done on the box by this force as it is pushed up the 5.00-m ramp to a height of 3.00 m.

It means that the position of the object is 3 m i.e. h = 3 m

Work done = Fd

= mgh

So,

$W=2.6\times 9.8\times 3\\\\W=76.44\ J$

(2) Now the gravitational potential energy that the box undergoes as it rises to its final height is equal to the work done by the box. So,

Change in potential energy = 76.44 J

6 0

2 years ago

14. A 8 kilogram rock is dropped off the top of a 25 meter tall building. What is the kinetic

mestny [16]

Answer:2000j

Explanation:

Law of conservation of energy energy State that in a close system energy can neither be created nor destroy but can be transformed from one form to another.

At the top of the height, the rock possessed only potential energy

PE=mass×g×height

PE =8×10×25

PE=2000j

The kinetic energy at the bottom of the building will also be 2000j since energy cannot be created or destroyed,and potential energy of 2000j have been converted to kinetic energy at the bottom of the building

8 0

2 years ago