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dem82 [27]
2 years ago
14

9. A 50 kg physics i student trudges from the 1st floor to the 3rd floor, going up a total height of 13 m.

Physics
1 answer:
SVETLANKA909090 [29]2 years ago
3 0

Answer:

6370 J

Explanation:

By the law of energy conservation, the work done by the student would be the change in potential enegy from 1st floor to 3rd floor, or a change of 13 m

W = E_p = mgh

where m = 50kg is the mass of the student, g = 9.8 m/s2 is the gravitational constant and h = 13 m is the height difference

W = 50*9.8*13 = 6370 J

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Answer:Respiration of carbon dioxide by plant roots can lead to the formation of carbonic acid which can chemically attack rocks and sediments and help to turn them into soils. There are a whole range of weathering processes at work near the surface of the soil, acting together to break down rocks and minerals to form soil.

I hope this is helpful

8 0
2 years ago
Which describes the eye of a hurricane?
777dan777 [17]
<h2><em><u>B</u></em></h2><h2><em><u>THE EYE OF THE STORM IS CALM</u></em></h2>
7 0
2 years ago
Read 2 more answers
PHYSICS
quester [9]

Answer:

c) 8.3 x 10^24 molecules

Explanation:

First of all, we convert the volume of the glass of water from mL to cm^3:

V=250 mL = 250 cm^3

The relationship between mass and volume is:

d=\frac{M}{V}

where

d=1.00 g/cm^3 is the density of water

M is the total mass of the glass of water

V=250 cm^3 is the volume of the water in the glass

Solving for M,

M=dV=(1.00)(250)=250 g = 0.250 kg

Now we know that the mass of a single molecule of water is

m=3.0\cdot 10^{-26}kg

The total mass of the water in the glass can be written as

M=Nm

where

N is the number of molecules in the glass of water

Solving for N, we find:

N=\frac{M}{m}=\frac{0.250}{3.0\cdot 10^{-26}}=8.3\cdot 10^{24}

7 0
3 years ago
When you kick a ball by a force of 26.3 newtons, what is the magnitude and direction of the force that you experience?
VikaD [51]
26.3 N in the reverse direction
6 0
3 years ago
Because she had serious traffic accident on Friday the 13th of last month, Felicia is conceived that all Friday the 13th will br
elena-s [515]

Answer:

Illusory correlation

Explanation:

Illusory correlation is a psychological phenomenon of sensing a correlation or relationship between a particular quantity and other variables however unrelated the two variables may be. A person may establish such connections, which are indeed false connections, as a result of over emphasis on novel incidents that are easily noticed due to them being salient

For example, when a waiter at a restaurant is being rude to a person after the person was made to walk under a ladder due to ongoing construction.

4 0
2 years ago
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