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zlopas [31]
3 years ago
6

If a truck weighs 18,000 N and it’s tires are inflated to a pressure of 190 kPa how large is the area of the trucks tires that a

re in contact with the ground
Physics
1 answer:
Mamont248 [21]3 years ago
4 0

0.095m²

Explanation:

Given parameters;

Weight of truck = 18000N

Pressure = 190kPa or 190000Pa

Unknown:

Area of truck tires = ?

Solution:

Pressure is given as the force per unit area of a substance:

            Pressure = \frac{force }{Area}

  Since Area is the unknown, we make it the subject of the expression;

            Area = \frac{force }{pressure}

                     =\frac{18000}{190000}

                     =  0.095m²

Learn more:

Pressure brainly.com/question/7882867

#learnwithBrainly

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garik1379 [7]

Answer:

You can increase your cardio respiratory endurance by exercising on the regular base that increase your heart beat and breathing rates. Some examples of good exercise is running, jumping rope, swimming dancing ect.

Explanation:

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5 0
2 years ago
Suppose that diameters of a new species of apple have a bell-shaped distribution with a mean of 7.2cm and a standard deviation o
Svet_ta [14]

Answer:

97.5%

Explanation:

By the empirical rule (68-95-99.7),

  1. 68% of data are within <em>μ </em>- <em>σ</em> and <em>μ </em>+ <em>σ</em>
  2. 95% of data are within <em>μ </em>- 2<em>σ</em> and <em>μ </em>+ 2<em>σ</em>
  3. 99.7% of data are within <em>μ </em>- 3<em>σ</em> and <em>μ </em>+ 2<em>σ</em>

<em>σ </em> and <em>μ</em> are the standard deviation and the mean respectively.

From the question,

<em>μ</em> = 7.2 cm

<em>σ</em> = 0.38 cm

7.96 = 7.2 + (<em>n</em> × 0.38)

<em>n</em> = 2

Hence, 7.96 represents <em>μ </em>+ 2<em>σ</em>.

P(X < <em>μ </em>+ 2<em>σ</em>) = P(X < <em>μ</em>) + P(<em>μ</em> < X < <em>μ </em>+ 2<em>σ</em>)

P(X < <em>μ</em>) is the percentage less than the mean = 50%.

P(<em>μ</em> < X < <em>μ </em>+ 2<em>σ</em>) is half of P(<em>μ </em>- 2<em>σ</em> < X < <em>μ </em>+ 2<em>σ</em>) = 95% ÷ 2 = 47.5%.

Considering this, for apples that are no more than 7.96 cm,

P(X < 7.96) = P(X < 7.2) + P(7.2 < X < 7.96) = 50% + 47.5% = 97.5%

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5 0
2 years ago
In the case of mechanical waves, what causes or determines the speed of the waves, the frequency of the waves, and the wavelengt
Levart [38]
The rate in witch ditermans the speed or vibration of the movment under the waves witch couses vibrational freequencys to be disrupted.
3 0
3 years ago
Read 2 more answers
PLEASE PLEASE HELPPPPPP!!!!!!!’
Ostrovityanka [42]
The answer is B

explanation
3 0
2 years ago
Photoelectrons are observed when a metal is illuminated by light with a wavelength less than 383 nm. What is the metal's work fu
Ulleksa [173]

Answer:

Work function of the metal is 3.24 eV.                                    

Explanation:

It is given that,

Wavelength, \lambda=383\times 10^{-9}\ m

Let W is the work function of the metal. It is given by using Einstein's photoelectric effect equation. It is given by :

W=\dfrac{hc}{\lambda}

W=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{383\times 10^{-9}}

W=5.193\times 10^{-19}\ J

Since, 1\ eV=1.6\times 10^{-19}\ J

So, W = 3.24 eV

So, the work function of the metal is 3.24 eV. Hence, this is the required solution.

3 0
2 years ago
Read 2 more answers
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