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Vesna [10]
3 years ago
5

A force of 2,500 pounds drags a truck 30 feet in 1/2 minute.

Chemistry
1 answer:
scoray [572]3 years ago
3 0
The right subject for this question is physics.

To calculate the work you use the formula:

Work = force * displacement

Work = 2500 pounds * 30 feet = 75,000 pounds - feet



To calculate the power you use the formula:

power = work / time

Power = 75,000 pound - feet / 30 seconds = 2300 pound-feet / second.
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How do human obtain the nitrogen they use in their bodies
Komok [63]
Humans get<span> the </span>nitrogen<span> they need by eating vegetebles or other meat that contain </span>nitrogen<span>. hope it helps :)</span>
8 0
3 years ago
Of protons, neutrons, and electrons, the least massive particle is the electron.is it True or False
const2013 [10]

The least massive particle is the electron. Hence, the option true is correct.

<h3>What are subatomic particles?</h3>

Sub-atomic particles are tiny particles of matter that together constitute an atom. There are three subatomic particles, which are namely electrons, protons and neutrons.

Protons and neutrons have approximately the same mass, but they are both much more massive than electrons (approximately 2,000 times as massive as an electron).

Hence, the option true is correct.

Learn more about the subatomic particles here:

brainly.com/question/13303285

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5 0
2 years ago
Consider the following reaction: 2A + 3B 2C+D If the rate of reaction does not change when the concentration of B is doubled, we
RUDIKE [14]

Answer:

The reaction is zero order with respect to B

Explanation:

The reaction given in the question is -

2A  + 3 B ---->  2C + D

From , the above reaction the rate law is written as -

rate = k [ A ]²[ B ]³

where ,

k = rate constant

In the above equation the order is determined by the sum of the powers of the concentrations , i.e. 2 + 3 = 5 order , which never possible ,

Hence , in the question ,

The by changing the concentration of B , the rate does not change .

hence , the rate is independent of the concentration of B .

Therefore ,

The order with respect to B will be zero .

4 0
3 years ago
What is the mass of a piece of iron that releases 179.85 joules of heat as it cools from 51.29 degrees Celsius to 31.42 degrees
Sedaia [141]

Answer:

20.11 g.

Explanation:

What is given?

c (specific heat of iron) = 0.450 J/g °C.

Q (heat energy) = 179.85 J.

ΔT (change of temperature) = |31.42 °C - 51.29 °C| = 19.87 °C.

What do we need? Mass of iron (m)

Step-by-step solution:

Let's see the formula of specific heat:

c=\frac{Q}{m\cdot\Delta T}

Where c is specific heat, Q is heat energy, m is mass and ΔT is the change of temperature.

We just have to solve for 'm' to find the mass of iron and replace the given data that we have, like this:

m=\frac{Q}{c\cdot\Delta T}=\frac{179.85\text{ J}}{0.450\text{ }\frac{J}{g\cdot\degree C}\cdot19.87\degree C}=20.11\text{ g.}

The mass of the iron would be 20.11 g.

5 0
2 years ago
Which of the following correctly ranks the following bonds in order from most to least polar?
skelet666 [1.2K]

Answer:

<u>O-H</u><u> </u><u>F-H</u><u> </u><u>N-Hy</u>

Explanation:

<u>C-H</u><u> </u><u>N-H</u><u> </u><u>O-</u><u>H</u><u> </u><u>F-</u><u>H</u>

4 0
3 years ago
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