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4 years ago

What is special about nitrogen, and what is its main function in the atmosphere

1 answer:

5 0

Nitrogen is the most abundant of the gases present in the atmosphere. 78 percent of the atmospheric air comprises of nitrogen, oxygen makes up for 21 percent and all other gases make up for the remaining one percent. Oxygen is a highly flammable gas and in the absence of nitrogen it would not have been possible to utilize this atmospheric oxygen, hence the presence of nitrogen reduces its flammability and also neutralizes the toxicity of other gases.

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Acceleration is defined as the rate of change for which characteristic?

Viktor [21]

Acceleration is defined as the rate of change for velocity. If the object is accelerating it is changing its velocity.

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4 years ago

Two football players are pushing a 60 kg blocking sled across the field at a constant speed of 1.5 m/s. the coefficient of kinet

Sladkaya [172]

F(friction) = u F(normal)
so, F(friction) = (.30)(60*9.81) = 177 N
F = ma
so, 177 = (60)a, a = 177/60 = 2.9m/s^2
v(final)^2 = v(initial)^2+2ax
so, 0 = 1.5^2 + 2(-2.9)x, x = 2.25/(2*-2.9) = -.38793 the negative indicates that the direction of accel is opposite of direction of speed.
-0.39 meters is the answer.

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3 years ago

Read 2 more answers

It takes 26.5 N to just pull a 72 kg sled across snow. What is the coefficient of friction?

Shtirlitz [24]

Assuming g = 10, the weight of the sled is 720N.

If it takes 26.5N to just pull the sled, then the frictional force f is 26.5N in the opposite direction.

f = μ*720N
26.5N = μ*720N
μ = 26.5N/720N = 0.037 (2 s.f.)

3 0

3 years ago

What is the total current for the parallel circuit?

Anton [14]

Answer:

$\huge\boxed{\sf Current = 6\ Ampere}$

Explanation:

<u>In a parallel circuit, Total resistance is:</u>

$\displaystyle \frac{1}{R_T} =\frac{1}{R_1} +\frac{1}{R_2}$

Where $R_1$ = 6Ω and $R_2$ = 12Ω

<h3><u>Finding </u> $R_T\\$ <u>:</u></h3>

$\displaystyle \frac{1}{R_T} =\frac{1}{6} +\frac{1}{12} \\\\\frac{1}{R_T} =\frac{1 \times 2+1}{12} \\\\\frac{1}{R_T} =\frac{3}{12} \\\\\frac{R_T}{1} = \frac{12}{3} \\\\\boxed{R_T=4 \ Ohm}$

<h3><u>Finding current:</u></h3>

V = 24 V, R = 4 Ω (V given, R found)

24 = I(4)

Divide 4 to both sides

6 A = I

Current = 6 Ampere

$\rule[225]{225}{2}$

8 0

2 years ago

Holding health care personal to lesser standards of care in emergencies is call the what statue?

olga55 [171]

Hello there,

Holding health care personal to lesser standards of care in emergencies is call the what statue?

Answer: A. Good Samaritan

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3 years ago