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fredd [130]
3 years ago
15

What is the formula of two vectors which are mutually perpendicular? ​

Physics
1 answer:
Svetllana [295]3 years ago
7 0

Answer:

a .(b+c) = a.b+a.c

Explanation:

As the three vectors are perpendicular to each other, one of them must lie perpendicular to the plane containing the other two vectors…say a lies perpendicular to the plane of b and c.(b + c )gives another vector which lies in same plane of c and b .

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Two neutral metal spheres on wood stands are touching. A negatively charged rod is held directly above the top of the left spher
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Answer: Option (C) is the correct answer.

Explanation:

As we know that metals are able to conduct electricity so, when a negatively charges rod is kept closer to the left sphere then electrons will enter the sphere.

Since, like charges repel each other. Hence, some of the negative changes from the rod will repel the negative charges of left sphere.

As both left and right spheres are touching each other so, the electrons will move towards the right sphere. As a result, there will be too many electrons (negative charge) present on the right sphere and very less electrons present in the left sphere.

Thus, we can conclude that the statement right sphere is negatively charged, another is charged positively, is true.

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3 years ago
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) A striker can give the ball an initial speed of 30m/s. Within what two elevation angles must he kick
sveticcg [70]

Answer:

  about 19.6° and 73.2°

Explanation:

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  y = -4.9(x/s·sec(α))² +x·tan(α)

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The elevation angle must lie between 19.6° and 73.2° for the ball to score a goal.

_____

I find it convenient to use a graphing calculator to find solutions for problems of this sort. In the attachment, we have used x as the angle in degrees, and written the function so that x-intercepts are the solutions.

5 0
2 years ago
What is the mani difference between kentic energy and potential energy
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Kinetic energy is stored energy that is released, for example, a fast-moving roller coaster down a slope. Potential energy is energy that has stored energy, for example, a stretched rubber band.
7 0
3 years ago
A wave is sent through a medium. The energy travels from left to right, and the direction of the wave travels from left to right
Art [367]
It's a longitudinal wave surely because information passes parallel to the direction of travel or something like that?
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