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3 years ago

You could increase the mechanical efficiency of this screw by _____.

Physics

2 answers:

Natali5045456 [20]3 years ago

8 0

the answer is the second option now u can give her brainliest.

Sati [7]3 years ago

6 0

You could increase the mechanical efficiency of this screw by reducing friction along the screw threads

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How has psychology developed from its prescientific roots in early understandings of mind and body to the beginnings of modern

bonufazy [111]

Answer:

By the experiences, ideas of origin, power and modern empiricism.

Explanation:

The route of the psychology has been recorded by the history of India, Middle East, Europe and China. The Confucius and Buddha focused on the ideas origin and the power. The ancient Hebrews, Aristotle and Pluto tells the idea whether the body with the mind is connected or it is distinct and this connection or distinct idea is the result of experiences.

Locke offers his theories about the mind that mind as the blank state, on which the experience writes. The modern empiricism idea has been developed by Bacon and Locke

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3 years ago

The heart working with the blood vessels to pump blood is which body system?

LiRa [457]

I think it’s the cardiovascular system

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3 years ago

A car moving has a speed of 35 m/s. What acceleration would it have if it took 5.0 s to come to a complete stop?

Pepsi [2]

Answer:

Explanation:

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3 years ago

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Which surface feature of the moon is characterized by mountainous areas?

solmaris [256]

Crates is the correct answer because they create dents that make the bumps of mountains.

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3 years ago

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*A car is going through a dip in the road whose curvature approximates a circle of radius 150m. At what velocity will the occupa

Valentin [98]

Answer:

v= 14.85 m/s

Explanation:

When at the bottom of the dip, the only force that keeps the car in the circular trajectory, is the centripetal force.
This force is not a new force, is just the net force aiming to the center of the circle.
In this case, is just the difference between the normal force (always perpendicular to the surface, pointing upward) and the force that gravity exerts on the car (which is known as the weight), pointing downward.
So, we can write the following expression:

$F_{cent} = F_{n} - F_{g} (1)$

It can be showed that the centripetal force is related to the speed by the following expression:
$F_{cent} = m*\frac{v^{2}}{r} (2)$

The normal force, it is called the apparent weight, because it would be the weight as measured by a scale.
Replacing (2) in (1), and solving for Fn, we get:

$F_{n} = m*\frac{v^{2} }{r} + m*g (3)$

Now, we need to find the value of v that makes Fn, exactly 15% more than the weight m*g, so we can write the following equation:

$F_{n} = 1.15*F_{g} = m*\frac{v^{2}}{r} +F_{g} (4)$

Replacing Fg by its value, simplifying, and solving for v, we get:

$v = \sqrt{0.15*g*r} = \sqrt{9.8 m/s2*0.15*150m} = 14.85 m/s (5)$

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3 years ago