1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anni [7]
2 years ago
9

The contact angle between the mercury surface and capillary tube wall is______ A) Less than 90 B) Equal to 90 C) Greater than 90

D) Varying with mercury level
Engineering
1 answer:
MakcuM [25]2 years ago
8 0

Answer:

The Answer to the question is :

Explanation:

The contact angle between the mercury surface and capillary tube wall is Greater than 90.

If the surface of the solid is hydrophobic, the contact angle will be greater than 90 °. On very hydrophobic surfaces the angle can be greater than 150º and even close to 180º.

You might be interested in
The human circulatory system consists of a complex branching pipe network ranging in diameter from
Stels [109]

Answer: the average velocity decreases

Explanation:

From the provided data we have:

Vessel    avg. diameter[mm] number

Aorta                 25.0                   1

Arteries             4.0                    159

Arteioles           0.06                 1.4*10^7

Capillaries         0.012               2.9*10^9

from the information, let \hat{m} be the mass flow rate, \rho is density, n number of vessels, and A is the cross-section area for each vessel

the flow rate is constant so it is equal for all vessels,

The average velocity is related to the flow rate by:

\hat{m} = v* \rho * A * n

we clear the side where v is in:

v = \frac{\hat{m}}{\rho A n}

area is π*R^2 where R is the average radius of the vessel (diameter/2)

we get:

v = \frac{\hat{m}}{\rho \pi R^2 n}

you can directly see in the last equation that if we go from the aorta to the capillaries, the number of vessels is going to increase ( n will increase and R is going to decrease ) . From the table, R is significantly smaller in magnitude orders than n, therefore, it wont impact the results as much as n. On the other hand, n will change from 1 to 2.9 giga vessels which will dramatically reduce the average blood velocity

8 0
3 years ago
Does anyone know how to fix this? It's a chromebook and project where I have to try to fix it​
Zielflug [23.3K]

Answer:

Hey I found this on You Tube it may help u a lot

Explanation:

https://youtu.be/ab9BdT6fYJ8

4 0
2 years ago
The following displacement (cm), output (V) data have been recorded during a calibration of an LVDT. Displacement (cm), output (
nadya68 [22]

Answer:

2.08V/cm

Explanation:

Plot the points on a graph. Draw the line of best fit. Calculate the gradietn of line of best fit.

Attached is the graph plotted on excel.

The equation of the line is

Votlage= 2.08× distance + 0.276

4 0
3 years ago
Workers who work with what kind of chemicals chemicals may require regular medical checkups on a more frequent basis as a result
vazorg [7]
Workers who work with TOXIC chemicals may require regular medical checkups on a more frequent basis as a result of contact.
8 0
2 years ago
In a paragraph of 125 words, explain at least three ways that engineers explore possible solutions in their
joja [24]

Answer:

Three ways that engineers explore possible solutions in their projects are;

1) Prototyping

2) Simulation

3) Calculations

Explanation:

1) Prototyping is the process of experimental testing of samples of design, or model of a product with the possibility of the inclusion of control of parameters in order to determine the workability of a solution.

2) Simulation is the process of creating an imitation of a situation, operation or process which can be used to determine if a particular solution will be able to work as required in the simulated environment of a problem.

3) Calculations are used to find preliminary results of particular situations, their cause and effects based on scientific laws, theories and hypothesis such that the factor of the problem is equated with the available ideas to find the best possible solution.

3 0
2 years ago
Other questions:
  • Technician A says that you don’t need to use an exhaust extraction system when working on vehicles equipped with a catalytic con
    9·1 answer
  • The textile industry has seen steady growth in the United States.<br> O True<br> O False
    12·1 answer
  • A closed system contains propane at 35°c. It produces 35 kW of work while absorbing 35 kW of heat. What is process? the temperat
    7·1 answer
  • An n- channel enhancement- mode MOSFET with 50 nm thick HfO2 high- k gate dielectric (Pr = 25) has a flat band voltage of 0.5 V,
    5·1 answer
  • What is the IMA of a fixed pulley ​
    7·2 answers
  • As part of an insurance company’s training program, participants learn how to conduct an analysis of clients’ insurability. The
    9·1 answer
  • Hi. I would like to know why one side of an island can get more rain (more rain forms), while the other gets less.
    15·2 answers
  • Who had launched the highest number of internet satellites as of March 2020?
    14·1 answer
  • 1. When and why should we use the Pattern option?
    12·1 answer
  • What two factors are changing when the current is changed on an electric generator
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!