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Scrat [10]
3 years ago
8

What is the angle between P×Q and P±Q? 1) 0 2) PIE/2 3) PIE 4) 3PIE/2

Physics
1 answer:
faltersainse [42]3 years ago
5 0

Answer:

option 2 is correct

Explanation:

the angle between p*q and p+q is 90 degree which is equal to π/2

it is rule that product of two vectors is always perpendicular to the plane in which both the vector lie

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If you make multiple measurements of your height, you are likely to find that the results vary by nearly half an inch in either
Lisa [10]

Answer:

Height h= 1.7 m

Explanation:

Supposing we have to find height in meter.

1 feet = 0.3048 m

1 inch = 0.0254 m

Given that:

5 feet

= 5×0.3048

= 1.524 m

and 7 inch = 7×0.0254= 0.1778 m

Therefore total height of a man in meter

5 feet 7 inch = 1.5424+0.1778 =1.7 m

Height h= 1.7 m

8 0
3 years ago
A 15.0 cm object is 12.0 cm from a convex mirror that has a focal length of -6.0 cm. What is the height of the image produced by
Vlad [161]

Answer: D. 5cm

Explanation:

Given the following :

Focal length (f) = - 6.0 cm

Height of object = 15.0cm

Distance of object from mirror (u) = 12.0cm

Height of image produced by the mirror =?

Firstly, we calculate the distance of the image from the mirror.

Using the mirror formula

1/f = 1/u + 1/v

1/v = 1/f - 1/u

1/v = 1/-6 - 1/12

1/v = - 1/6 - 1/12

1/v = (- 2 - 1) / 12

1/v = - 3 / 12

v = 12 / - 3

v = - 4

Using the relation :

(Image height / object height) = (- image distance / object distance)

Image height / 15 = - (-4) / 12

Image height / 15 = 4 / 12

Image height = (15 × 4) / 12

Image height = 60 / 12

Image height = 5cm

6 0
3 years ago
01.04 Law of Conservation of Energy <br> science question
mojhsa [17]

Answer:

 law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time.

5 0
3 years ago
What is amu?? How is 1amu=1.606*10*-27?
navik [9.2K]

Answer:

amu is atomic mass unit

All of elements hydrogen is the lightest.

Hydrogen is taken as a basic unit so it happened 1amu

So 1 amu must be hydrogen mass

If I am wrong,Pls tell me the true answer....

3 0
3 years ago
An athelete runs some distance before taking a long jump because : give answer
insens350 [35]
Hi Pupil Here's your answer ::



➡➡➡➡➡➡➡➡➡➡➡➡➡

An Athelete run some distance before taking a long jump because by running the Athelete gives himself larger inertia of motion.


⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅


Hope this helps .....

3 0
4 years ago
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