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3 years ago

A horse pulls on an object with a force of 300 newtons and does 12,000 joules of work. How far was the object moved?

Physics

1 answer:

ki77a [65]3 years ago

7 0

Answer:

Explanation:

because 12,000 divided by 300 is 40 so its 40m

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What is the main idea of this text of "Phillis Wheatley"

Troyanec [42]

Answer:

The main idea of the text is to tell you how Phillis wheatley grew up and what the person life was like

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3 years ago

The drawing shows two thermometers, A, and B, whose temperatures are measured in °A and °B. The ice and boiling points of water

Rama09 [41]

Unf there's no diagram. but this looks like a sort of celsius to fahrenheit temp scale conversion sort of problem.

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3 years ago

PLS HELP ASAP WILL MARK BRAIN and pls explain your answer....

lora16 [44]

Answer:

it is sublimation because There are three ways heat is transferred into and through the atmosphere:

radiation.

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convection.

Explanation:

please mark me as brainliest as you wrote over there

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3 years ago

The output voltage of a voltage amplifier has been found to decrease by 20% when a load resistance of 1 k is connected. What is

yKpoI14uk [10]

We use the voltage division problem between the load resistance, amplifier output resistance as

$V_{out} = V_{amlifire} \times \frac{R_{load} }{R_{load} + R_{out} }$ .

Here, $V_{out}$ is the output voltage, $V_{amlifire}$ is the amplifier voltage, $R_{load}$ is the load resistance and $R_{out}$ is the amplifier output resistance.

Therefore,

$1-\frac{20}{100} = \frac{1 \ k\Omega }{1 \ k\Omega +R_{out} } \\\\ R_{out} = \frac{1 \ k\Omega }{0.8} -1 \ k\Omega =1250 \Omega -1000 \Omega =250 \Omega$ .

Thus, the amplifier output resistance is $250 \ \Omega$ .

4 0

3 years ago

1. explain why nichrome wire used in the heater.

Monica [59]

Answer:

1. The reason why nichrome wire is used in a heater is due to the properties of nichrome which makes it a material of choice for heating application including;

i) The cost of manufacture of nichrome is low

ii) Nichrome has both high mechanical and creep strength, and therefore is suitable for installation and use in a wide setting

iii) Nichrome has a high resistance to electron flow, making it a good electrical heating element

iv) Nichrome has a high resistance to oxidation, such that it can be reused several times as a heater

v) The high ductility of nichrome allows it to be stretched and drawn around different vessels with contents to which heat is to be supplied

2. Copper wire is not used in heaters because according to Joule's law, the heat produced from the flow of electric current, 'I', through a material having a resistance, 'R', for a time, 't', is proportional to I²·R·t, and copper has a very low resistance, 'R', to the flow of electric current, and therefore, will not produce sufficient heat required at a given current level

Explanation:

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3 years ago