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3 years ago

8

PLEASE HELP ME ASAP: Some students are using samples of different substances for a lab investigation. They plan to observe the p

hysical properties of each substance and record their observations in a table like the one below.
Which of the substances observed are elements?

1 answer:

marin [14]3 years ago

3 0

Answer: S,Fe,O2,Sr, and Al

Explanation: I saw it on quizlet

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A quantity of water is heated from 25.0°C to 36.4°C by absorbing 325 J of heat energy. If the specific heat of water is 4.18 J /

Arlecino [84]

Answer:

6,8 g

Explanation:

c = 4.18 J/(g * °C) = 4180 J / (kg * °C)

$t_{1}$ = 25 °C

$t_{2}$ = 36,4 °C

Q = 325 J

The formula is: Q = c * m * ( $t_{2} - t_{1}$ )

m = $\frac{Q}{c * (t_{2} - t_{1} )}$

Calculating:

m = 325 / 4180 * (36,4 - 25) ≈ 0,0068 kg = 6,8 g

6 0

3 years ago

would a cloud or a rock be more dense? PLSSSSSS HELP PLSSS I WILL MARK BRAINLIEST AND ANSWER SOME OF YOUR QUESTIONS

QveST [7]

A rock is definitely more dense. If you were to put a cloud in water it would float/stay above it and a rock would sink to the bottom

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3 years ago

What do you call the procedure that helps you determine the volume of an irregularly shaped object, whole using a graduated cyli

ki77a [65]

The method is called the displacement method.

You place some water in the graduated cylinder and measure its volume.
Then you add your object and measure the new volume.
The difference between the two volumes is the volume of your object.

6 0

3 years ago

Explain why there is a difference in the thickness of the crust between the side of the moon facing the Earth and the side that

Ray Of Light [21]

Answer:

the lack of maria; the thicker crust means it was harder for giant impacts to pierce the crust and get darker basaltic lava bubbling up.

Explanation:

4 0

2 years ago

Please help me !!! thank yoy

Helga [31]

Answer:

Motor Neurons.

Explanation:

Each motor neuron ending dits very close to a muscle fibre.

Hope that helps

Sorry if wrong

Have a good day

7 0

3 years ago