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3 years ago

Does the surface tension of water affect the rate of evaporation? If so, would adding a surfactant speed up evaporation?

Physics

1 answer:

Goshia [24]3 years ago

6 0

Answer:

The evaporation time gradually increased with the increase in surfactant concentration, i.e., from water to the concentration level of 0.005%. Furthermore, the evaporation time is significantly reduced, even lower than that of water containing relatively high concentrations from 0.01% to 0.1%.

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Atoms with certain characteristics are radioactive. Which of those below will

Andrei [34K]

Answer:

D. all atoms with an atomic number over 83

8 0

2 years ago

A mass M is hanging from a rope of length L and mass m. A student gives the mass a quick horizontal shake to set up a wave which

disa [49]

Answer:

Explanation:

Expression for velocity of wave produced in a hanging wire can be given as follows

Velocity v = $\sqrt{\frac{T}{m} }$

where T is tension in wire and m is mass of wire per unit length.

In the given case

T = Mg + mg

= Mg

neglecting weight of rope

mass of the rope per unit length

= m / L

Velocity of wave

= $\sqrt{\frac{Mg}{\frac{m}{L} } }$

= $\sqrt{\frac{MgL}{m} }$

4 0

3 years ago

A railroad car is pulled through the distance of 960 m by a train that did 578 kJ of work during this pull.

Wittaler [7]

Answer:

Explanation:

The force supplied by the train can be found by using the formula

$f = \frac{w}{d} \\$

w is the workdone

d is the distance

From the question we have

$f = \frac{578000}{960} \\ = 602.083333...$

We have the final answer as

Hope this helps you

7 0

3 years ago

Dr. Matthews has submitted a proposal to the institutional review board (IRB) of a university. At this university, she intends t

OlgaM077 [116]

The IRB at the university will decide whether her study meets ethical guidelines before it is initiated. The importance of these codes of conduct is to safeguard research participants, the status of psychology and the researchers or psychologists themselves. Moral issues hardly yield a simple, unequivocal, right or wrong answer. It is consequently often a matter of judgment whether the research is justified or not. For instance, it might be that a study roots psychological or physical uneasiness to participants, maybe they agonize pain or maybe even come to solemn harm.

6 0

3 years ago

Somebody please help I need exuse to not go to pe because I injured my self anybody know what to say

algol13

Answer:

Say you feel like you twisted ur ankle or can move your foot or something in that category

3 0

3 years ago