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lisabon 2012 [21]
3 years ago
12

Please answer this soon. Thank u.

Physics
1 answer:
vodomira [7]3 years ago
6 0

Answer:

The distance used to calculate the pressure of atmosphere is 75 cm.

Explanation:

  • Mercury barometer is used to find the pressure of the atmosphere where it is placed.
  • As shown in the figure, the barometer has an inverted tube where mercury has risen by 75 cm. This height is taken into count to measure the atmospheric pressure.
  • At the place with high pressure the mercury in the inverted tube will go very high and vice versa.
  • Hence to find the pressure we must note down the height of mercury that has risen the inverted tube.
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Why does pumping a soccer ball with an air pump increase the pressure inside the ball? the pump puts more gas particles inside t
Archy [21]

Answer:

The pump puts more gas particles inside the ball

Explanation:

7 0
3 years ago
Read 2 more answers
In the equation y =cnat2 you wish to determine theinteger value (1,2 etc.) of the exponent n. the dimensions ofy, a, and t are k
kvasek [131]

<u>NO.</u><u>  Since </u><u>"c"</u><u> has no dimensions, the value of its exponent </u><u>"n" </u><u>is irrelevant to dimensional analysis, and thus </u><u>dimension analysis </u><u>cannot be used to determine the value of </u><u>"n".</u>

Dimensional analysis is not applicable to proportionality constants, trigonometrical or exponential equations, equation consisting of sum or difference of some quantities and equation consisting of more than three fundamental quantities.

What is Dimensional analysis?

  • Dimensional Analysis is a problem-solving technique that makes use of the fact that any number or expression can be multiplied by one without changing its value.
  • It is also known as the Factor-Label Method or the Unit Factor Method. It is a practical method.

What is a dimensional analysis used for?

Dimensional analysis is a method used in engineering and the physical sciences to reduce physical properties like acceleration, viscosity, and energy to their three basic dimensions of length, mass, and time (T).

Learn more about Dimensional analysis

brainly.com/question/13078117

#SPJ4

5 0
2 years ago
Consider a car engine running at constantspeed. That is, the crankshaft of the en-gine rotates at constant angular velocity whil
Irina-Kira [14]

Answer:

The value is  |v| = 7.39 \  m/s

Explanation:

From the question we are told that

    The angular speed is  w = 2030 \ rpm = \frac{2030 * 2 * \pi }{ 60} =  212.61 \ rad/s

    The distance between the minimum and maximum external position is  d = 6.95 \ cm  = 0.0695 \ m

Generally the amplitude of the crank shaft is mathematically represented as

         A =  \frac{d}{2}      

=>     A =  \frac{0.0695}{2}    

=>     A =  0.03475 \  m

Generally the maximum speed of the piston is mathematically represented as

        |v| = A * w  

=>    |v| = 0.03475 * 212.61

=>    |v| = 7.39 \  m/s

     

7 0
3 years ago
PLEASE HELP ):
jolli1 [7]

The first thing we must do for this case is the sum of forces in a horizontal direction.

We have then:

F1 + F2 = m * a

Substituting values we have:

50 + 75 = m * 2.5

From here, we clear the mass of the object:

m * 2.5 = 125\\m = 125 / 2.5\\m = 50 Kg

We now look for the weight of the object.

W = m * g

Where,

g: acceleration of gravity (9.8 m/s^2)

Substituting values:

W = 50 * 9.8\\W = 490 N

Answer:

the weight of the object is:

W = 490 N

option 4

6 0
3 years ago
Which is a FALSE statement about elements? Select one: a. Each element has its own neutron number. b. Each element has its own a
Nata [24]
It is A. Number of neutrons can differ with and be the same any given element.
3 0
3 years ago
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