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3 years ago

Which number is not found on the periodic table

Physics

1 answer:

miv72 [106K]3 years ago

4 0

The letter “j” is never found on the periodic table. As for numbers, there’s an infinite amount

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How do you find average velocity (average) from acceleration) and time (t)?

Tasya [4]

Average velocity is defined as the ratio in change in position to change in time,

v[ave] = ∆x/∆t

which on its own doesn't have anything to do with acceleration.

If acceleration is constant, the average velocity is the literal average of the initial and final velocities,

v[ave] = (v[final] + v[initial]) / 2

If this constant acceleration has magnitude a, the final velocity can be expressed in terms of the initial velocity by

v[final] = v[initial] + a*t

and plugging this into the previous equation gives

v[ave] = (v[initial] + a*t + v[initial])/2

v[ave] = v[initial] + 1/2*a*t

If the body in consideration is initially at rest, then

v[ave] = 1/2*a*t

which might be the relation you're looking for. But bear in mind the conditions I've underlined.

If acceleration is not constant and changes over time, so that the acceleration is some function of time a(t), then you can determine the velocity function v(t) by using the fundamental theorem of calculus. You need to know a particular velocity for some time to completely characterize v(t), though. For example, if you're given the initial velocity v[initial] = v(0), then

$\displaystyle v(t) = v(0) + \int_0^t a(u) \, du$

or if you know any other velocity for some time t₀ > 0,

$\displaystyle v(t) = v(t_0) + \int_{t_0}^t a(u) \, du$

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3 years ago

Parts of the breathing system

vladimir2022 [97]

Answer:

it is a branch of tissue and organs . More it includes airways lungs and blood cells The muscles that power our lungs are also part of respiratory system .These parts work together to inhale oxygen and clean out waste materials(carbon dioxide) from our body .

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3 years ago

30 points!

vlada-n [284]

Answer:

Since strong nuclear forces involve only nuclear particles (not electrons, bonds, etc) items 3 and 4 are eliminated.

Again item 2 refers to bonds between atoms and is eliminated.

This leaves only item 1.

Nuclear forces are very short range forces between components of the nucleus.

Weak nuclear forces are trillions of times smaller than strong forces.

Gravitational forces are much much smaller than the weak nuclear force.

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A bowling ball and a golf ball are both dropped from the same height at the same time.

igor_vitrenko [27]

They would both hit at the same time

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Which number is not found on the periodic table​

Which number is not found on the periodic table