3 years ago

The atoms of a molecule come from two or more?

Physics

1 answer:

AlladinOne [14]3 years ago

7 0

Compounds. two or more compounds.

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In the experiment, a meter is hooked up to a speaker to monitor the amplitude of the received sound. Suppose the background sign

FrozenT [24]

Answer:

The answer is " $15.38\%$ "

Explanation:

Background $= 13 \ mv\\\\$

corrected signal $= 91 \ mv-13\ mv= 78\ mv\\\\$

with attenuator $=25\ mv-13\ mv= 12\ mv\\\\$

$\to \frac{p_t}{p_i}=\frac{12}{78}\times 100= 15.38\%$

4 0

3 years ago

A student needs to prepare 100.0 mL of vitamin C solution according to the directions in Part 1 of the experiment. S/he weighs o

Rudiy27

Answer:

4.99 mg of vitamin C are in the beaker.

Explanation:

Given that,

Weight of vitamin = 0.0499 g

Molar mass = 176.124 g/mol

Weight of water = 100.0 ml

We need to calculate the mg of vitamin C in the beaker

We dissolve 0.0499 g vitamin C in water to from 100.0 ml solution.

100 ml solution contain 49.9 mg vitamin C

Now, we take 10 ml of this vitamin C solution in breaker

Since, 100 ml solution =49.9 mg vitamin C

Therefore,

$10\ ml\ solution =\dfrac{10\times49.9}{100}$

$10\ ml\ solution =4.99\ mg$

Hence, 4.99 mg of vitamin C are in the beaker.

4 0

3 years ago

A stationary speed gun emits a microwave beam at 2.10x10^10 Hz. It reflects off a car and returns 638 Hz lower. What is the spee

stiv31 [10]

Answer:

The answer is 4.55 m/s!

Explanation:

I wish you luck with Acellus! We got 15 days left!

Please mark brainliest.

6 0

3 years ago

A pencil is rolled off a table of height 0.92 m. If it has horizontal speed pf 1.4 m/s, how long does it take the pencil to reac

Alenkasestr [34]

The distance an object falls, from rest, in gravity is

   D = (1/2) (G) (T²)

'T' is the number seconds it falls.

In this problem,

   0.92 meter = (1/2) (9.8) (T²)

Divide each side by 4.9 : 0.92 / 4.9 = T²

Take the square root
of each side: √(0.92/4.9) = T

      0.433 sec = T

The horizontal speed doesn't make a bit of difference in
how long it takes to reach the floor. BUT ... if you want to
know how far from the table the pencil lands, you can find
that with the horizontal speed.

The pencil is in the air for 0.433 second.
In that time, it travels
   (0.433s) x (1.4 m/s) = 0.606 meter

from the edge of the table.

3 0

3 years ago

Which describes freefall

Sati [7]

A motion where gravity is the only force acting upon it

6 0

4 years ago