A child pulls a sled up a snow-covered hill. The child does 504 J of work on the sled. If the child walks 15 m

How can this sandstone become an igneous rock?

Answer:Extreme pressure from burial, increasing temperature at depth, and a lot of time, can alter any rock type to form a metamorphic rock. If the newly formed metamorphic rock continues to heat, it can eventually melt and become molten (magma). When the molten rock cools it forms an igneous rock.

Explanation:

6 0

3 years ago

Four forces act on bolt A as shown; F1 150N, F2 80N, F3 110N and F4 100N. Determine the magnitude and direction of the resultant

netineya [11]

Complete Question

The complete question(reference (chegg)) is shown on the first uploaded image

Answer:

The magnitude of the resultant force is $F = 199.64 \ N$

The direction of the resultant force is $\theta = 4.1075^o$ from the horizontal plane

Explanation:

Generally when resolving force, if the force (F )is moving toward the angle then the resolve force will be $Fcos(\theta )$ while if the force is moving away from the angle then the resolved force is $Fsin (\theta )$

Now from the diagram let resolve the forces to their horizontal component

So

$\sum F_x = 150 cos(30) + 100cos(15) -80sin (20)$

$\sum F_x = 199.128 \ N$

Now resolving these force into their vertical component can be mathematically evaluated as

$\sum F_{y} = 150 sin(30) - 100sin(15) -110 +80 cos(20)$

$\sum F_{y} = 14.30$

Now the resultant force is mathematically evaluated as

$F = \sqrt{F_x^2 + F_y^2}$

substituting values

$F = \sqrt{199.128^2 + 14.3^2}$

$F = 199.64 \ N$

The direction of the resultant force is evaluated as

$\theta = tan^{-1}[\frac{F_y}{F_x} ]$

substituting values

$\theta = tan^{-1}[\frac{ 14.3}{199.128} ]$

$\theta = 4.1075^o$ from the horizontal plane

5 0

4 years ago

Which of these is an organism??

elena55 [62]

You need to add a picture or answers!

5 0

3 years ago

Optics of the eye: the closest object that a typical young person with normal vision can focus on clearly is closest to:______.

Natali [406]

The human eye is one of the most valuable sense organ. The closest object that a typical young person with normal vision can focus closest to is 25 cm

The lens in the eye forms the image on the retina. The image formed is real and inverted. The retina is a very delicate membrane containing numerous light sensitive cells.

This light sensitive cells gets activated when light falls on it and generates electric signals. These electric signals are sent to the brain via the optic nerves present in the eye. The brain finally processes these signals and thus we see the object clearly.

The ability of the lens of the eye to adjust its focal length accordingly is called the power of accommodation,

The minimum distance, at which the object can be seen clearly without any strain is called the least distance of distinct vision.

To see an object clearly without any strain is when we place it at about 25 cm from the eye.

Tolearn more about optics of the eye : brainly.com/question/22371574

#SPJ4

5 0

2 years ago

This fossil snake and this living rat both have a structure in their skull called the quadrate bone. What best explains why both

kolbaska11 [484]

The snake and rat both share the same ancestor population that had a quadrate bone, which was inherited from an ancestor population.

<h3>What is a homo-logous structure?</h3>

A homo-logous structure is a trait that may or not have the same function but has a common evolutionary origin.

A homo-logous structure can be used to trace the evolutionary relationships between species.

Conversely, an analogous structure has the same function but it does not reflect an evolutionary origin.

Learn more about homo-logous structure here:

brainly.com/question/8405772

8 0

2 years ago