Convert 1 mm of Hg into pascal

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Answer 1

Answer: 1 millimeter of mercury is 133.322 pascals

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A skateboarder has an acceleration of -1.9 m/s2. If her initial speed is 6 m/s how long does it take her to stop?A. 4.1s B. 3.2s C. 0.32s D. 2.1s
As we move above up from one trophic level to another in an energy pyramid, what happens to the energy?a. It decreases from one trophic level to another. b. It remains the same for each trophic level. c. It increases from one trophic level to another.
A current carrying wire wrapped around an iron ore is called a
PLEASE HELP :/george walks to a friend's house. he walks 750 meters north, then realizes he walked too far he turns and walks 250 meters south. the entire walk takes him 50 seconds whats his distance and displacement?
How much work is done in the vertical direction if 125 N of force is needed to hold an object at shoulder height as a person walks 2 m forward

A mass that weighs 8 lb stretches a spring 24 in. The system is acted on by an external force of 4 sin 4t lb. If the mass is pulled down 6 in. and then released, determine the position of the mass at any time. Determine the first four times at which the velocity of the mass is zero

Answers

Answer:

$t = (\pi)/(8), (\pi)/(4), (3\pi)/(8), (3 \pi)/(4)$

Explanation:

The equation of force is

F = 4 sin 4 t

Compare with the standard equation

f = A sin wt

where, w is the angular frequency and A is the amplitude.

Now

w = 4 rad/s

Let the time period is T.

the relation for the time period is

$T = (2\pi)/(w)\n\nT = (2 \pi)/(4)\n\nT = (\pi)/(2)$

the time period is defined as the time taken by the body to complete one oscillation.

So, the velocity is zero at the extreme points where the object is at time, T/4 and its odd T/2, 3T/4, 3T/2, etc.

So, the velocity is zero at time

$t = (\pi)/(8), (\pi)/(4), (3\pi)/(8), (3 \pi)/(4)$

Final answer:

To determine the position of the mass and the times when the velocity is zero in a mass-spring system.

Explanation:

To determine the position of the mass at any time, we need to solve the equation of motion for the mass-spring system. The equation is:

mx'' + kx = Fext

where m is the mass, x is the displacement of the mass from its equilibrium position, k is the spring constant, and Fext is the external force. We can solve this differential equation to find the position of the mass as a function of time.

To determine the first four times at which the velocity of the mass is zero, we need to solve for the velocity of the mass, which is given by:

v = x'

We can find the times at which the velocity is zero by finding the values of t for which x' = 0.

Learn more about Mass-spring system here:

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Gaseous helium is in thermal equilibrium with liquid helium at 6.4 K. The mass of a helium atom is 6.65 × 10−27 kg and Boltzmann’s constant is 1.38066 × 10−23 J/K. Determine the most probable speed of a helium atom. Answer in units of m/s.

Answers

Answer:

162.78 m/s is the most probable speed of a helium atom.

Explanation:

The most probable speed:

$v_(mp)=\sqrt{(2K_bT)/(m)}$

$K_b$ = Boltzmann’s constant = $1.38066* 10^(-23) J/K$

T = temperature of the gas

m = mass of the gas particle.

Given, m = $6.65* 10^(-27) kg$

T = 6.4 K

Substituting all the given values :

$v_(mp)=\sqrt{(2* 1.38066* 10^(-23) J/K* 6.4 K)/(6.65* 10^(-27) kg)}$

$v_(mp)=162.78 m/s$

162.78 m/s is the most probable speed of a helium atom.

In power plants, generators convert mechanical energy into chemical energy.

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The statement “In power plants, generators convert mechanical energy into chemical energy” is false. It should be that the generator will convert chemical energy from the raw material such as fuel oil that it receives into mechanical energy to generate energy.

Answer:

A girl who is watching a plane fly tells her friend that the plane isn’t moving at all. Describe a frame of reference in which the girl’s description would be true

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In the frame of reference of the passengers, flight attendants,
pilot ... anybody ON the plane ... the plane isn't moving at all.

What is average velocity of a particle?

Answers

Average velocity during a time interval is

   (the straight-line distance between the starting point and ending point,
   regardless of the route followed along the way)
divided by
   (the length of the time interval)
in the direction
   (from the starting point to the finishing point).

Avg. velocity = total Displacement / Total time taken
PLEASE MARK BEST

An individual with true self knowledge is familiar with

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The best answer for this would be strength and weaknesses. An individual with true self knowledge is familiar with his or her strength and weaknesses. Once an individual know which is his weakness or strength, he or she will be able to decide through which he or she truly desires.

In short @Taskmasters is correct But is is A. For plato

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