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2 years ago

Subatomic particles that do not possess any charge but provide mass to atoms are called

Physics

1 answer:

WARRIOR [948]2 years ago

6 0

Answer:

Neutrons

Explanation:

Neutrons are subatomic particles that are electrically neutral and possess no charge in them.

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A spaceship of mass 8600 kg is returning to Earth with its engine turned off. Consider only the gravitational field of Earth. Le

Katyanochek1 [597]

Answer:

$\Delta KE = 4.20\times 10^{13}\ J$

Explanation:

given,

mass of spaceship(m) = 8600 Kg

Mass of earth = 5.972 x 10²⁴ Kg

position of movement of space ship

R₁ = 7300 Km

R₂ = 6700 Km

the kinetic energy of the spaceship increases by = ?

Increase in Kinetic energy = decrease in potential energy

$\Delta KE = GMm (\dfrac{1}{R_2}-\dfrac{1}{R_1})$

$\Delta KE = GMm (\dfrac{R_1-R_2}{R_2R_1})$

$\Delta KE = 6.67 \times 10^{-11}\times 5.972 \times 10^{24}\times 8600 (\dfrac{7300 - 6700}{7300 \times 6700})$

$\Delta KE = 6.67 \times 10^{-11}\times 5.972 \times 10^{24}\times 8600 (\dfrac{600}{48910000})$

$\Delta KE = 4.20\times 10^{13}\ J$

5 0

2 years ago

What is the chemical formula for aluminum nitride? A) Al3 B) AlN3 C) Al3N3 D) AlN

OleMash [197]

The answer is c Ai3n3 yea that’s the right answer idk

6 0

2 years ago

Read 2 more answers

How much energy does it take to melt a 16.87 g ice cube? ΔHfus = 6.02 kJ/mol How much energy does it take to melt a 16.87 g ice

Vilka [71]

Answer:

How much energy does it take to melt a 16.87 g ice cube? ΔHfus = 6.02 kJ/mol How much energy does it take to melt a 16.87 g ice cube? = 6.02 kJ/mol

A. 108 kJ

B. 102 kJ

C. 5.64 kJ

D. 936 kJ

E. none of the above

5.64 kJ

Explanation:

The Heat of fusion is the heat energy required to dissolve a given mass of ice at melting point.

<h3>Step by Step Calculation</h3>

The heat energy required to dissolve ice can be calculated using the expression below;

Q = ΔH $_{f}$ x m ...............................................1

where Q is the heat energy required;

ΔH $_{f}$ is the heat of fusion for ice;

m is the mole

All the parameters above are provided in the question except m, so to get m we use the molar mass of water (also for ice) which is 18.01528 g/mol .

This means that 18.01528 g of ice is contained in one mole, therefore the mole for 16.87 g of ice is given as;

$m = \frac{16.87g}{18.015g/mol}$

m = 0.9364 mole of ices

Now the parameters are complete, we are given;

ΔH $_{f}$ = 6.02 kJ/mol

m = 0.9364 mol

Q =?

Substituting into equation 1, we have

Q = 6.02 kJ/mol x 0.9364 mol

Q = 5.64 kJ

Therefore, the energy required to melt 16.87 g of ice is 5.64 kJ

5 0

2 years ago

You have found a treasure map that directs you to start at a hollow tree, walk 300 meters directly north, turn and walk 500 mete

Dmitry_Shevchenko [17]

Answer:633 m

Explanation:

First we have moved 300 m in North

let say it as point a and its vector is $300\hat{j}$

after that we have moved 500 m northeast

let say it as point b

therefore position of b with respect to a is

r $_{ba}=500cos(45)\hat{i}+500sin(45)\hat{j}$

Therefore position of b w.r.t to origin is

$r_b=r_a+r_{ba}$

$r_b=300\hat{j}+500cos(45)\hat{i}+500sin(45)\hat{j}$

$r_b=500cos(45)\hat{i}+\left [ 250\sqrt{2}+300\right ]\hat{j}$

after this we moved 400 m $60^{\circ}$ south of east i.e. $60^{\circ}$ below from positive x axis

let say it as c

$r_{cb}=400cos(60)\hat{i}-400sin(60)\hat{j}$

$r_c=r_{b}+r_{cb}$

$r_c=500cos(45)\hat{i}+\left [ 250\sqrt{2}+300\right ]\hat{j}+400cos(60)\hat{i}-400sin(60)\hat{j}$

$r_c=\left [ 250\sqrt{2}+200\right ]\hat{i}+\left [ 250\sqrt{2}+300-200\sqrt{3}\right ]\hat{j}$

magnitude is $\sqrt{\left [ 250\sqrt{2}+200\right ]^2+\left [ 250\sqrt{2}+300-200\sqrt{3}\right ]^2}$

=633.052

for direction $tan\theta =\frac{250\sqrt{2}+300-200\sqrt{3}}{250\sqrt{2}+200}$

$tan\theta =\frac{307.139}{553.553}$

$\theta =29.021^{\circ}$ with x -axis

7 0

1 year ago

A hot piece of iron is thrown into the ocean and its temperature eventually stabilizes. Which of the following statements concer

777dan777 [17]

Answer:

E. The ocean gains more entropy than the iron loses.

Explanation:

When there is a spontaneous process , entropy of the system increases . Here hot iron is losing entropy and ocean is gaining entropy . Net effect will be gain of entropy . That means entropy gained by ocean is more than entropy lost by iron .

Hence option E is correct .

8 0

1 year ago