You could increase the mechanical efficiency of this screw by

1 answer:

3 0

I can't see the screw (if you'll pardon the expression), so I don't know a thing about it, and can't answer the question. There's no given information in the question.

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Earth's _____ cycle moves water from one reservoir to another. This cycling of materials is one of Earth's dynamic processes.

Alenkinab [10]

Earth's HYDROLOGIC cycle moves water from one reservoir to another.

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3 years ago

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ou have just moved into a new apartment and are trying to arrange your bedroom. You would like to move your dresser of weight 3,

Dimas [21]

So far, since you moved into the apartment until the end of this much of the story, you haven't done ANY work on the dresser yet.

I'll admit that you pushed, groaned and grunted, sweated and strained plenty. You're physically and mentally exhausted, you're not interested in the dresser at the moment, and right now you just want to snappa cappa brew, crash on the couch, and watch cartoons on TV. But if you've done your Physics homework, you know you haven't technically done any work yet.

In Physics, "Work" is the product of Force times Distance.

Since the dresser hasn't budged yet, the Distahce is zero. So no matter how great the Force may be, it's multiplied by zero, so the Work is zero.

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4 years ago

Is there a pattern to the volcano distribution around the plant?

alexira [117]

Hi there!

Typically volcanoes are found alongside tectonic plate boundaries and in that sense could be considered a pattern. One of the most famous is 'The Ring of Fire' which is a ring of volcanoes in the pacific ocean along the pacific plate boundary.

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3 years ago

A spotlight on the ground shines on a wall 12m away. If a man 2m tall walks from the spotlight toward a building at a speed of 1

exis [7]

we suppose that x be distance of man from spot light is
so 12-x is distance from man to wall
we will draw first triangle ABC, where
a= spotlight (on ground)
b= man (feet)
c= man (head)
we know that AB = x and BC = 2
by extend line AB to the wall at point D and extend line AC to the wall at point E
AD = 12 (distance from spotlight to wall)
DE = s (length of shadow)
Now triangles ABC and ADE are similar
Therefore DE/AD = BC/AB
s / 12 = 2 / x
s = 24 / x
Differentiate both sides with respect to t
ds/dt = -24/x² dx/dt
Man is walking toward building at speed of 16 ms
dx/dt = 16
Man is 4 m from the building/wall
12 - x = 4
x = 8
Find ds/dt when x = 8 and dx/dt = 16
ds/dt = -24/x² dx/dt
ds/dt = -24/(64) * 16
ds/dt = -6

So length of shadow is decreasing at rate of 6 m/s
hope it helps

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4 years ago

Calculate the speed of a 500.0 kilogram car that possesses 400,000 joules of kinetic energy.

lozanna [386]

Answer: 40m/s

Explanation:

Given that,

speed of car (v) = ?

Mass of car (m) = 500.0 kilogram

Kinetic energy (KE) = 400,000 joules

Recall that kinetic energy is possessed by a moving object, and it depends on the mass and speed by which the object moves

i.e Kinetic energy = 1/2mv²

400,000J = 1/2 x 500.0kg x v²

400,000J = 250.0kg x v²

v² = 400,000J / 250.0kg

v² = 1600

Find the square root of v²

v = √1600

v = 40m/s

Thus, the speed of the car is 40m/s

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3 years ago