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Greeley [361]
2 years ago
5

Density is mass per unit of volume. Which pair of lab instruments would a student use to measure the density of seawater?

Biology
1 answer:
9966 [12]2 years ago
7 0
<h3>Answer:  C. a balance and a beaker</h3>

Explanation:

A balance would be used to measure the weight, which in turn effectively measures the mass (more or less). Imagine that we have a brick that we know is 1 pound. If we have an object that needs 5 bricks on one side to balance it out, then we know the object is 5 pounds.

The beaker is used to measure the volume. It's basically a measuring cup that you would find in the kitchen.

To get the density, you divide the mass over volume.

For example, if you have a material that has a mass of 100 grams and it's volume is 20 cm^3, then its density is 100/20 = 5 grams per cm^3.

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densk [106]

Answer:

Identifying elements in astronomical objects using their spectra. Measuring the spectrum of light from a star can tell astronomers what the star is made up of. Since each element emits or absorbs light only at a particular wavelength astronomers can identify what element are in the stars from the lines in their spectra.

4 0
3 years ago
How many bones are there in Skull​
lubasha [3.4K]

Answer:

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7 0
3 years ago
A tobacco plant is heterozygous for the genes for long stems (Ss), large leaves (Ll), and fibrous roots (Rr). It is crossed with
Ainat [17]
Firstly, start by doing Punnett squares for each of the characteristics. Attached are the three Punnet squares, made by me, as they should look in end.

For each of the Punnet squares, one characteristic each, we find that half of the offspring will be heterozygous for that characteristic.
Therefore, according to the product rule, you should now multiply the quantity of heterozygous for each characteristic and then obtain the total part of the offspring that's fully heterozygous.

\frac{1}{2}Ss×\frac{1}{2}Ll×\frac{1}{2}Rr=\frac{1}{8}SsLlRr

Total offspring×\frac{1}{8}=10
There is 10 plants in the total offspring that are heterozygous for all the considered three genes.

7 0
3 years ago
What do we call resistance to disease?
xz_007 [3.2K]
Immunity is our bodies natural response to resisting disease. Immunglobulins work by detecting pathogens and destroying them before they cause disease. 
7 0
3 years ago
Read 2 more answers
In the 1918 flu pandemic, why did more teenagers and young adults die than other
zloy xaker [14]

Answer:

4

Explanation:

I believe it's four, scientifically speaking a young person most likely wouldn't die of infection because their immune systems can fight off the infection to some degree. But if the young person was the caretaker of someone who was/is infected, the younger person is more susceptible to getting an infection and dying because there is no one there to take care of them when they get infected.

5 0
2 years ago
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