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3 years ago

Choose the correct statement about the periodic table's organization from the choices below.

Physics

1 answer:

Ksivusya [100]3 years ago

7 0

We need to be able to the see the choices to help you answer the question:)

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Is the following statement true or false? Nuclear fission occurs naturally in stars .

Mashcka [7]

True it can happen naturally trough radiation and decay of elements not only in earth but other planets too.

4 0

4 years ago

Determine the minimum amount of energy needed to move a satellite from its orbit around the Earth to an infinite distance from t

zmey [24]

Answer: $19.80\times 10^{10} J$

Explanation:

Given

mass of satellite $m=7.45 \times 10^3 kg$

orbital radius $R=7.50\times 10^6 m$

mass of Earth $M=5.97\times 10^{24} kg$

Minimum amount of Energy to move Satellite from its orbit to an infinite distance is sum of Potential Energy + Kinetic Energy of Satellite

$W=U+K.E.$

$U=-G\frac{Mm}{R}$

$U=-6.67\times 10^{-11}\times \frac{5.97\times 10^{24}\times 7.45 \times 10^3}{7.50\times 10^6}$

$U=-\frac{296.658\times 10^{16}}{7.5\times 10^6}$

$U=-39.55\times 10^{10} J$

$K.E.=\frac{1}{2}\times mv^2$

Where $v=orbital\ velocity$

$v=\sqrt{\frac{GM}{r}}=\sqrt{\frac{6.67\times 10^{-11}\times 5.97\times 10^{24}}{7.50\times 10^6}}$

$v^2=5.30\times 10^7 m/s$

$K.E.=\frac{1}{2}\times mv^2$

$K.E.=\frac{1}{2}\times 7.45\times 10^3\times (5.30\times 10^7)=19.74\times 10^{10} J$

$W=-39.55\times 10^{10}+19.74\times 10^{10}$

$W=-19.80\times 10^{10} J$

i.e. $19.80\times 10^{10} J$ Energy is required to provide to move Satellite out of its orbit

8 0

3 years ago

Find the self-inductance of a 1700-turn solenoid 55 cm long and 4.0 cm in diameter. Express your answer with the appropriate uni

Nitella [24]

The self-inductance of the solenoid is 8.25 mH.

The given parameters;

number of turns, N = 1700 turn
length of the solenoid, l = 55 cm = 0.55 m
diameter of solenoid, d = 4 cm
radius of the solenoid, r = 2 cm = 0.02 m

The area of the solenoid is calculated as follows;

$A = \pi r^2\\\\A = \pi \times (0.02)^2\\\\A = 0.00125 \ m^2$

The self-inductance of the solenoid is calculated as follows;

$L = \frac{\mu_o N^2 A }{l} \\\\L = \frac{(4\pi \times 10^{-7}) \times 1700^2 \times 0.00125}{0.55} \\\\L = 0.00825 \ H\\\\L = 8.25\ mH$

Thus, the self-inductance of the solenoid is 8.25 mH.

Learn more here:brainly.com/question/15612168

4 0

3 years ago

True or false: Even though ozone protects us when we are breathing it near the ground, it is harmful to us when it is high up in

LiRa [457]

Answer:

i think its false

Explanation:

4 0

3 years ago

Read 2 more answers

A satellite orbiting the earth is directly over a point on the equator at 12:00 midnight every three days. It is not over that p

victus00 [196]

Answer: the radius of the satellite's orbit is r = 8.78×10⁷m

Explanation:

given the time period, T= 3days

converting the time in days to seconds is given as;

time, T=(3*24*60*60) sec

T=259200 sec

from the force relation;

mv²/r = Gm×M/r²

v²=G×M/r ---------------(1)

and

V=2pi×r/T

V²=4×pi²×r²/T²

====>

from equation (1) , we have

4×pi²×r²/T²=G×M/r

this becomes; 4×pi²×r³/T² = G×M

r³ = G×M×T²/(4pi²)

r³ = 6.67×10⁻¹¹×(5.97×10²⁴)×(259200)²/(4pi²)

==> r=8.78×10⁷m

radius of the orbit, r=8.78×10⁷ m

8 0

4 years ago