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3 years ago

Based on the law of conservation of energy, how can we reasonably improve a machine’s ability to do work?

Physics

2 answers:

Readme [11.4K]3 years ago

7 0

Answer:

Reduce the friction between its moving parts.

Explanation:

kifflom [539]3 years ago

6 0

Based on the law of conservation of energy, we know that we can't create energy, machines can only convert one type of energy into another. So, if we want to improve a machines's ability then we need to reduce it's loss energy (part of energy which is useless). Out of all the options only Option C fits best with it.

In short, Your Answer would be Option C

Hope this helps!

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On Mars, where air resistance is negligible, an astronaut drops a rock from a cliff and notes that the rock falls about d meters

dimulka [17.4K]

Answer:

$d_1 = 16 d$

Explanation:

As we know that initial speed of the fall of the stone is ZERO

$v_i = 0$

also the acceleration due to gravity on Mars is g

so we have

$d = v_i t + \frac{1}{2}gt^2$

now we have

$d = 0 + \frac{1}{2}g t^2$

now if the same is dropped for 4t seconds of time

then again we will use above equation

$d_1 = 0 + \frac{1}{2}g(4t)^2$

$d_1 = 16(\frac{1}{2}gt^2)$

$d_1 = 16 d$

7 0

3 years ago

Read 2 more answers

When the mass of the sun is larger, Earth moves around the sun at a faster or slower pace.

maw [93]

-- The mass of the sun never increases.

-- It does decrease, but not nearly enough to have any noticeable
effect on the orbital motion of the Earth, or any other planet.

-- When Earth is closer to the sun, it moves faster in its orbit.

-- When Earth is farther from the sun, it moves slower in its orbit.

-- The result is that the line from the sun to the Earth always covers
the same amount of area in the same length of time.

-- Johannes Kepler noticed this, and it's his Second Law of planetary motion.

-- Newton showed that if his equations for gravity and motion are correct,
then planets MUST behave this way.

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2 years ago

Select the correct answer. What happens when a negatively charged object A is brought near a neutral object B? A. Object B gets

givi [52]

What happens when a negatively charged object A is brought near a neutral object B is that: B. Object B gets a positive charge.

<h3>The law of electrostatic forces.</h3>

According to the law of electrostatic forces, unlike charges attract each other while like charges repel one another.

This ultimately implies that, objects that are having the same charges (like charges) would repel one another, and this causes a transfer of electrons (charges) to any differently charged object which comes in contact with it, through a process known as conduction.

In this context, we can reasonably and logically deduce that the negative charge of object A would induce an opposite charge (positive) on object B when a negatively charged object A is brought near a neutral object B.

Read more on charges here: brainly.com/question/1824478

#SPJ1

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7 months ago

Ecosystem services ____.

stepan [7]

Answer:

c) are economically valuable services provided by natural systems is the correct answer.

Explanation:

Ecosystem services are methods that happen in an ecosystem.

Ecosystem services are the abundance of advantages that nature gives to society and humankind.

Ecosystem services make the individual life pleasant via producing nutritious food and cleaned water, controlling disease, oxygen generation, soil formation, biomass production and giving social and spiritual advantages.

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2 years ago

A ball of weight 400 N is placed on a smooth inclined plane of inclination 30o. To a point P on its circumference an inextensibl

sladkih [1.3K]

The Tension is 200N and the Normal force is
$200 \sqrt{3 }$
Check the pic For solution !!

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2 years ago