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postnew [5]
1 year ago
10

5. A student walks 167 meters in 185 seconds. The student stops for 135 seconds and

Physics
1 answer:
eimsori [14]1 year ago
6 0

The average speed of the entire walk is 0.6761 m/s.

A student walks 167 meters in 185 seconds. The student stops for 135 seconds.

Now, the total distance covered by the student = 167 meters

The total time taken by the student till now = ( 185 + 135 ) seconds

Then a student walks 215 meters farther in 245 seconds. Now,

The total distance covered by the student = ( 167 + 215 ) meters

The total time taken by the student till now = ( 185 + 135 + 245 ) seconds

The average speed of the entire walk = ( total distance covered ) / (  total time taken )

The average speed of the entire walk = ( ( 167 + 215 ) meters ) / (  ( 185 + 135 + 245 ) seconds )

The average speed of the entire walk = ( 382 / 565 ) meter/second

The average speed of the entire walk = 0.6761 m/s.

The average speed of the entire walk is 0.6761 m/s.

To know more about average speed refer to the link:

brainly.com/question/18102135

#SPJ9

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PtichkaEL [24]

Answer:

The pressure exerted by the brick on the table is 18,933.3 N/m².

Explanation:

Given;

height of the brick, h = 0.1 m

density of the brick, ρ = 19,300 kg/m³

acceleration due to gravity, g = 9.81 m/s²

The pressure exerted by the brick on the table is calculated as;

P = ρgh

P = (19,300)(9.81)(0.1)

P = 18,933.3 N/m²

Therefore, the pressure exerted by the brick on the table is 18,933.3 N/m².

4 0
3 years ago
A certain heat engine takes in 300 J of energy from a hot source and then transfers 200 J of that energy to a colder object. Wha
Greeley [361]

Answer:

The efficiency is 0.33, or 33%.

Explanation:

From the thermodynamics equations, we know that the formula for the efficiency of a heat engine is:

\eta=1-\frac{Q_2}{Q_1}

Where η is the efficiency of the engine, Q_1 is the heat energy taken from the hot source and Q_2 is the heat energy given to the cold object. So, plugging the given values in the formula, we obtain:

\eta=1-\frac{200J}{300J}=0.33

This means that the efficiency of the heat engine is 0.33, or 33% (The efficiency of an engine is dimensionless).

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What is the name of the person that help people at the gym?
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That is called a physical trainer or a fitness coach. Hope I helped!

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If the number of particles of a gas is increased, the gas pressure will do what?
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Gas pressure will also increase then.., if volume is kept constant
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3 years ago
Prove dimensionally that: PV=RT
Oduvanchick [21]

Ideal Gas Law PV = nRT

THE GASEOUS STATE
Pressure  atm
Volume  liters
n  moles
R  L atm mol^-1 K^-1
Temperature  Kelvin


pv = rt

divide both sides by v
pv/v = rt/v

p = rt/v

answer: p = rt/v




Ideal Gas Law: Density

PV = NRT
PV = mass/(mw)RT

mass/V = P (MW)/RT = density



Molar Mass:
Ideal Gas Law PV = NRT
PV = mass/(MW) RT
MW = mass * RT/PV


Measures of Gases:
Daltons Law of Partial Pressures; is the total pressure of a mixture of gases equals the sum of the partial pressures of the individual gases.

Total = P_ A + P_ B

P_ A V = n_ A RT

P_ B V = n_ B R T



Partial Pressures in Gas Mixtures:
P_ total = P_ A + P_ B
P_ A = n_ A RT/V P_ B = n_ B RTV

P_ total = P_ A + P_ B = n_ total RT/V




For Ideal Gasses:


P_ A = n_ A RT/V P_ total = n_ toatal RT/V



P_ A/P_ total = n_ A RTV/n_ total RTV


= n_ A/n_ total = X_ A





Therefore, P_ A = X_ A P_ total.



PV = nRT


P pressure

V volume


n Number of moles


R Gas Constant


T temperture (Kelvin.).







Hope that helps!!!!!! Have a great day : )

4 0
3 years ago
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