PHYSICS HIGH SCHOOL

How many nitrogen atoms are in one molecule of (NH4)2SO4?

Answers

Answer 1
Answer: 15 nitrogen atoms are in one molecule
Answer 2
Answer:

Final answer:

In one molecule of (NH4)2SO4 or ammonium sulfate, there are two nitrogen atoms.

Explanation:

The molecule (NH4)2SO4 is known as ammonium sulfate. This molecule is composed of two ammonium ions (NH4) and one sulfate ion (SO4). The ammonium ion consists of one nitrogen atom (N) and four hydrogen atoms (H). Because the formula indicates there are two ammonium ions (as shown by the subscript '2'), this means the overall molecule of ammonium sulfate contains two nitrogen atoms.

Learn more about Ammonium Sulfate here:

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A wrench reduces the force needed to tighten a bolt. For this statement to be true, the wrench _____.

mr knote a piano tuner taps his 440-hz tunning fork with a mallet. what is the period of the vibrating fork?

Answers

By using the relation between period and frequency, we conclude that the period of the fork is0.0023 seconds.

What is the period of the vibrating fork?

We know that the relation between period and frequency is:

T = 1/f

where T is the period and f is the frequency.

In this case, we know that the frequency of the fork is 440 Hz, where:

1 Hz = 1/s

Then the period of the fork will be:

T = 1/(440 Hz) = (1/440) s = 0.0023 s

Meaning that each complete vibration of the fork takes 0.0023 seconds.

If you want to learn more about waves, you can read:

brainly.com/question/15531840
f = 1/t

or, 440 = 1/t

thus,  440t = 1

thus, t = 1/440

thus, time period is 0.002273 seconds

A scientific model is based on assumptions that limit where and how the model can be applied. True False​

Answers

Answer:

i think it is true

Explanation:

The space shuttle is descending through the earth's atmosphere. How is the mass of the shuttle affected?A. It will remain constant.
B. It will increase with descent.
C. It will decrease with descent.

Answers

the answer is not C i turned it in and got that question wrong.

the answer is B it will increase with descent

I turned it in the second time and i got it right

Answer:it will remain consent because it will be floating up instead of descending

so thats all i have hope i help

Explanation:

Consider two walls, A and B, with the same surface areas and the same temperature drops across their thicknesses. The ratio of their thermal conductivities is kA/kB=4 and the ratio of the wall thickness is LA/LB=2. The ratio of heat transfer rates through the walls qA/qB is:(a) 0.5

(b) 1

(c) 2

(d) 4

(e) 8

(f) None of them

Answers

Answer:

(c) 2

Explanation:

Heat transfer across the walls due to conduction is given by:

q = -KA(\Delta T)/(L)

where,

q = heat transfer rate

K = thermal conductivity

A = Area

ΔT = change in temperature

L = thickness

For wall A:

q_A = -K_AA(\Delta T)/(L_A)

For wall B:

q_B = -K_BA(\Delta T)/(L_B)

Because the change of temperature and area of walls are the same. Dividing both terms:

(q_A)/(q_B) = ((K_A)/(L_A) )/((K_B)/(L_B))\n\n (q_A)/(q_B) =((K_A)/(K_B) )/((L_A)/(L_B))

using values given in the question:

(q_A)/(q_B) = (4)/(2)\n\n(q_A)/(q_B) = 2

Therefore, the correct answer is:

(c) 2

What would be the effect of doubling the rate of star formation, R*, on the results of the Drake equation?Drake equation: N = R* × ƒp × ne × ƒl × ƒi × ƒc × L
A. There would be no difference in the results.
B. There would be half as many extraterrestrial civilizations.
C. There would be twice as many extraterrestrial civilizations.
D. There would be four times as many extraterrestrial civilizations.

Answers

The right answer for the question that is being asked and shown above is that: "D. There would be four times as many extraterrestrial civilizations." the effect of doubling the rate of star formation, R*, on the results of the Drake equation is that there would be four times as many extraterrestrial civilizations.

Choose most accurate statement:a. Waves can exist in liquids and gases only.
b. Waves can exist in liquids and solids only.
c. Waves can exist in solids and liquids only.
d. Waves can exist in solids, liquids, and gases.

Answers

"Waves can exist in solids, liquids, and gases."
is the ONLY accurate statement.

The word "only" in the other 3 statements makes them
not accurate at all.
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