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2 years ago

Where would you find convergent and divergent plate boundaries relative to

Physics

1 answer:

Sergio [31]2 years ago

8 0

Answer:

When two tectonic plates meet, we get a “plate boundary.” There are three major types of plate boundaries, each associated with the formation of a variety of geologic features.

Explanation:

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A wheelbarrow is a complex machine that combines which simply marchines?

koban [17]

It's most likely the combination of a bucket and the wheel.

4 0

3 years ago

Read 2 more answers

Suppose a baseball and a marble are dropped att the same time from the same height. which ball would land first according to ari

Natasha_Volkova [10]

The baseball would fall faster, because it has more mass

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3 years ago

Suppose you add two vectors A and B . What relative direction between them produces the resultant with the greatest magnitude? W

Akimi4 [234]

Answer:

Same direction to produce maximum magnitude and opposite direction to produce minimum magnitude

Explanation:

Let a be the angle between vectors A and B. Generally when we add A to B, we can split A into 2 sub vectors, 1 parallel to B and the other perpendicular to B.

Also let A and B be the magnitude of vector A and B, respectively.

We have the parallel component after addition be

Acos(a) + B

And the perpendicular component after addition be

Asin(a)

The magnitude of the resulting vector would be

$\sqrt{(Acos(a) + B)^2 + (Asin(a))^2}$

$= \sqrt{A^2cos^2a + B^2 + 2ABcos(a) + A^2sin^2a}$

$= \sqrt{A^2(cos^2a + sin^2a) + B^2 + 2ABcos(a)}$

$= \sqrt{A^2 + B^2 + 2ABcos(a)}$

As A and B are fixed, the equation above is maximum when cos(a) = 1, meaning a = 0 degree and vector A and B are in the same direction, and minimum with cos(a) = -1, meaning a = 180 degree and vector A and B are in opposite direction.

8 0

3 years ago

A 17.0 cm tall cup is placed 75.5 cm away from the center of a concave mirror with a focal length of 39.0 cm. What is the height

Elena-2011 [213]

Explanation:

It is given that,

Height of the object, h = 17 cm

Object distance, u = -75.5 cm

Focal length of the concave mirror, f = -39 cm

We need to find the height if the cup's mirror image. Let v is the image distance. Using mirror's equation as :

$\dfrac{1}{f}=\dfrac{1}{u}+\dfrac{1}{v}$

$\dfrac{1}{f}-\dfrac{1}{u}=\dfrac{1}{v}$

$\dfrac{1}{(-39)}-\dfrac{1}{(-75.5)}=\dfrac{1}{v}$

v = −80.67 cm

Let h' is the magnification of the mirror. The magnification of mirror is given by:

$m=\dfrac{-v}{u}=\dfrac{h'}{h}$

$h'=\dfrac{-vh}{u}$

$h'=\dfrac{-(-80.67)(17)}{-75.5}$

h' = −18.16 cm

So, the image of cup is 18.16 cm tall and it is inverted. Hence, this is the required solution.

6 0

3 years ago

Negative work can be done (a) by friction on the tires while a car is accelerating without skidding. (b) by a spring at the bott

Snowcat [4.5K]

Answer:

(a) by friction on the tires while a car is accelerating without skidding.

Explanation:

Negative Work is done, when the body moves in a direction, that is completely opposite to the direction of the force applied. Thus, the angle between force and displacement becomes 180°, and the Cos 180° in formula gives -1.

(a) Since, the frictional force acts opposite to the direction of motion of the car or tires. Therefore, negative work can be done by friction.

(b) The motion of spring is in the direction of force. Thus, it does not give negative work.

Therefore, the correct answer is:

<u>(a) by friction on the tires while a car is accelerating without skidding.</u>

8 0

3 years ago