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2 years ago

What is your hypothesis (or hypotheses) for this experiment? This lab is about density

Physics

2 answers:

densk [106]2 years ago

8 0

I’m doing like almost the same

Zolol [24]2 years ago

6 0

The _____ with less density will sink and the higher density ____ will rise

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How would you go about separating the components of a mixture of sand, gravel, salt and iron filings

larisa86 [58]

Pour the entire components into water.

First the iron filings can be separated using a magnet as iron is a magnetic element.

By pouring the mixture into water, it allows the salt to dissolve in the water, while the sand will not.

Next we can run this solution through a filtration device to separate the sand from the water.

Now all that's left is to let the water evaporate so that the salt will be exposed that dissolved into the water.

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3 years ago

Match the correct term with each part of the wave

Misha Larkins [42]

6 . . . . . a crest
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9 . . . . . a trough

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3 years ago

Which of the following is true about the mass of an object?

Butoxors [25]

I believe it is the first one

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2 years ago

A worker is thinking about two ways to get a box up 1.2 m onto a loading dock. He can use a force of 250 N to lift it straight u

harina [27]

Answer:

<em>The second option has a lower power output. P=30 W</em>

Explanation:

<u>Mechanical Power </u>

It is a physical magnitude that measures the rate a work W is done over time t.

$\displaystyle P=\frac{W}{t}$

Since W=F.d

$\displaystyle P=\frac{F.d}{t}$

The first option means the worker will lift the box by a distance of 1.2 meters in 3 seconds by applying 250 N of force. That produces a power of

$\displaystyle P=\frac{(250). (1.2)}{3}=100\ Watt$

The second option requires the worker applies 75 N of force and travel a distance of 4 meters for 10 seconds, thus the power is

$\displaystyle P=\frac{(75). (4)}{10}=30\ Watt$

The second option has a lower power output

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3 years ago

which organ system maintains posture and produces heat? a. muscluar b. nervous c. skeletal d. integumentary

Ostrovityanka [42]

Answer is a shoe this helps

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2 years ago