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3 years ago

I NEED HELP ANSWER FAST WILL GIVE BRAINLY!!!!!!!

Physics

2 answers:

stealth61 [152]3 years ago

6 0

It allowed Easely to have quick calculations

Evgen [1.6K]3 years ago

5 0

Answer:

Moseley's work provided a method that could be used to determine exactly how many empty spaces remained in the periodic table. After this discovery, chemists turned to using atomic number as the fundamental ordering principle for the periodic table, instead of atomic weight.

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What is ft, the magnitude of the tangential force that acts on the pole due to the tension in the rope?

Arisa [49]

The magnitude of the tangential force that acts on the pole due to the tension in rope is given as

T= weight x tan (theta) /2

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4 years ago

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A boy of mass 80 kg slides down a vertical pole, and a frictional force of 480 N acts on him. What is his acceleration as he sli

olga_2 [115]

Answer:

His acceleration is $\overrightarrow{a}=4\frac{m}{s^{2}}$

Explanation:

Newton's second law states that acceleration of a body is cause by a net force, the relation between them is:

$\sum\overrightarrow{F}=m\overrightarrow{a}$

On the boy there're acting two forces, his weight (W) that points downward and the frictional force (f) that points upward (they boy moves downward and friction always is opposite to movement). So $\sum\overrightarrow{F}=\overrightarrow{W}+\overrightarrow{f}$ so (1) is:

$\overrightarrow{W}+\overrightarrow{f}=m\overrightarrow{a}$

Using the positive direction downward weight and gravitational acceleration(g) are positive and friction force is negative:

$W-f=m\overrightarrow{a}$ , solving for a:

$\overrightarrow{a}=\frac{W-f}{m}$ , weight is mg:

$\overrightarrow{a}=\frac{mg-f}{m}=\overrightarrow{f}=\frac{(80kg)(10\frac{m}{s^{2}})-(480)}{80}$

$\overrightarrow{a}=4\frac{m}{s^{2}}$

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4 years ago

A proton is trapped in a one-dimensional well that is 200 pm wide. What is the ground state energy of the proton, if the potenti

Harrizon [31]

Answer:

E=1.50\times 10^{-18}J

Explanation:

Energy of the one dimensional infinite well,

$E=\frac{n^{2}h^{2} }{8mL^{2} }$

Given that, $L=200 pm\\L=200\times 10^{-12}m$

For the ground state n=1,

Therefore energy is,

$E=\frac{(6.626\times 10^{-34})^{2}}{8(9.1\times 10^{-31})(200\times 10^{-12}) ^{2} }\\E=1.50\times 10^{-18}J$

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3 years ago

A 0.9 kg metal bolt is heated to an unknown initial temperature. It is then dropped into a Calorimeter containing 0.15 kg of wat

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Whets nasılsın merhaba arkadaşlar ben bu etikete yazar nasılsın

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3 years ago

Which scientist did voltaire translate and popularize in france? galileo newton copernicus locke

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Voltaire popularize and translate isaac newton and the story of the apple. voltaire is a huge fan of the physicist and mathematician sir isaac newton. upon receiving a copy of the "principia mathematica" of sir isaac newton he was so happy knelt down on it.

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