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3 years ago

15

Which of the following BEST explain why a book lying on a table does not move, even though the force of gravity is acting on it

accelerating it toward the center of the earth.

1 answer:

muminat3 years ago

8 0

It would not move because while gravity is pushing it down, the table is also pushing it up therefor canceling out

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For a ∆x of 0.1mm, what is ∆px, the uncertainty in the transverse momentum of a photon passing through a slit (where uncertainty

Colt1911 [192]

Answer:

$0.53\times 10^{-30}kgms^{-1}$

Explanation:

Uncertainty principle say that the position and momentum can not be measured simultaneously except one relation which is described below,

$\Delta x\Delta p=\frac{h}{4\pi }$

Given that the uncertainty in x is 0.1 mm.

Therefore,

$\Delta p=\frac{6.626\times 10^{-34} }{4\times 3.14\times 1\times 10^{-4}m }\\\Delta p=0.53\times 10^{-30}kgms^{-1}$

Therefore, uncertainty in the transverse momentum of photon is $0.53\times 10^{-30}kgms^{-1}$

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3 years ago

A weightlifter lifts a set of weights a vertical distance of 2.00m.If a constant net force of 350 N is exerted on the weights,wh

MrMuchimi

Answer:

<em>W=700 Joule</em>

Explanation:

<u>Physics Work </u>

Is the dot product of the force vector by the displacement vector

$W=\vec F \cdot \vec r$

When both the force and the displacements are pointed in the same direction, the formula reduces to its scalar version

$W=F.d$

The weightlifter is applying a net force of 350 N to lift the weights a distance of 2 m, thus the net work done is

$W=350\ N\ .\ 2\ m=700\ Joule$

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3 years ago

An object can have forces acting upon it, but might not accelerate<br><br> True<br> or<br> False?

vivado [14]

Answer:

true

Explanation:

if you apply force to the top of a square it will not move

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3 years ago

Circuit has a single pathway for the electrons of flow.<br> series<br> parallel

Bad White [126]

Series circuit!!!!!!!!!!

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Question: 23 of 66: If you increase the frequency of a sound wave four times, what will happen to its speed?Select one of the op

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If you increase the frequency of a sound wave four times, t<span>he speed will increase four times. The correct option among all the options that are given in the question is the first option or option "A". This also shows the frequency and speed of the waves are directly proportional to each other. I hope it helps you.</span>

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3 years ago

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