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3 years ago

Represent the following sentence as an algebraic expression, where "a number" is the

Physics

2 answers:

prisoha [69]3 years ago

4 0

Answer:

2(x - 8)

Explanation:

r-ruslan [8.4K]3 years ago

3 0

Answer:

não sei.................

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Considering , will F ever equal zero?

Kamila [148]

No it will not because F will equal 3 not 0

4 0

4 years ago

Read 2 more answers

In the simple Bohr model of the eighth excited state of the hydrogen atom, the electron travels in a circular orbit around a fix

Ksju [112]

Answer:

Net force on electron will be $12.568\times 10^{-12}N$

Explanation:

We have given that the orbit $r=4.28\times 10^{-9}m$

Speed of the electron $v=2.43\times 10^5m/sec$

Mass of the electron is given as $m=9.11\times 10^{-31}kg$

Centripetal acceleration is given by $a_c=\frac{v^2}{r}=\frac{(2.43\times 10^5)^2}{4.28\times 10^{-9}}=1.3796\times 10^{19}m/sec^2$

Force is given by F = ma

So force $F=9.11\times 10^{-31}\times 1.3796\times 10^{19}=12.568\times 10^{-12}N$

8 0

3 years ago

Describe the structure of an atom

scZoUnD [109]

Answer: Atoms consist of 3 particles: protons, electrons, and neutrons. The nucleus of the atom contains the protons and neutrons. The outer regions contain the electrons

Explanation:

5 0

3 years ago

Unpolarized light passes through two ideal Polaroid sheets. The axis of the first is vertical and the axis of the second is at 3

andrew-mc [135]

Answer:

63.78%

Explanation:

The equation that relates the angle of the polarization and the intensity of ligth transmitted is I=Io*cos²(x), where I is the intensity of the incident light, Io is the intensity of the transmitted light, and x is the angle of polarization. The fraction of incident light will be I/Io, so the answer in given by cos²(37) = 0.6378

3 0

3 years ago

Bart runs up a 2.91 meters high flight of stairs at a constant speed in 2.15 seconds. If barts mass is 65.9kg determine the work

Tanzania [10]

Answer:

1879.33J

874.1W

Explanation:

Given parameters:

Distance covered = 2.91m

Time taken = 2.15s

Mass of Bart = 65.9kg

Unknown:

Work done = ?

Power rating = ?

Solution:

Here, the work done is related to the the potential energy in climbing this flight of stairs.

Work done = Potential energy = mgH

where m is the mass

g is the acceleration due to gravity

H is the height

Work done = 65.9 x 9.8 x 2.91 = 1879.33J

Power is defined as the rate at which work is being done.

Power = $\frac{Work done }{time taken}$

= $\frac{1879.33}{2.15}$

= 874.1W

6 0

3 years ago