Physics, 01.04.2021 08:50 nana55959

Suppose to a scientist was able to construct a barometer with a liquid being twice denser than mercury, then how would the liquid raise at standard pressure?

Answers: 1

Show answers

Answers

Answer from: snehpatel3356

h = h₀/2, the liquid column rises half the height

Explanation:

Pressure is defined as force per area,

P = F / A

in a barometer the force is the weights of the liquid column

F = W = mg

P = m g/A

if we use the definition of density

ρ = $\frac{m}{A h}$

$\frac{m}{A}$ = ρ h

we substitute

P = ρ g h

Let's use the index o for the mercury

P₀ = ρ₀ g h₀

when we change the liquid for another with

ρ = 2ρ₀

the pressure expression is

P = 2ρ₀ g h

in the problem they indicate that the pressure is equal to the initial P = P₀

we substitute

ρ₀ g h₀ = 2ρ₀ g h

h₀ = 2h

h = h₀/2

the liquid column rises half the height

Answer from: Quest

The magnets are probably damaged or there not strong enough to attached to the refrigerator

Answer from: Quest

The figure is missing but we can answer anyway.the correct answer is "releasing the string". in fact, when the person is holding the bow and the arrow, the kinetic energy of the arrow is still zero (because the arrow is not moving). the moment the arrow is released, it acquires a velocity v, so its kinetic energy will become different from zero: $k= \frac{1}{2}mv^2$ where m is the mass of the arrow and v its velocity. all the other options, instead, do not increase the kinetic energy of the system: - pulling farther back on the string : this will just increase the elastic potential energy of the system- holding the arrow higher: this will increase the gravitational potential energy of the system (which is given by u=mgh, where h is the height above the ground)- decreasing the mass of the arrow: this will decrease the gravitational potential energy of the system (which is given by u=mgh, where m is the mass)

Other questions on the subject: Physics

Physics, 21.06.2019 20:20, jazmaine1217

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

Answers: 2

continue

Physics, 22.06.2019 12:50, WritingStar1313

The combining of light nuclei is called blank. blank as in not actually blank. you know what im tryin to say.

Answers: 1

continue

Physics, 22.06.2019 15:00, tanaemichel

Sodium chloride, nacl, is formed when a sodium atom transfers its electron to a chlorine atom. the difference in charge between the two atoms creates a(n) attraction that bonds them together.

Answers: 1

continue

Physics, 22.06.2019 16:30, Unicorn66y

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?

Answers: 3

continue

You know the right answer?

Suppose to a scientist was able to construct a barometer with a liquid being twice denser than mercu...