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inna [77]
1 year ago
8

Solve the last question

Physics
1 answer:
shusha [124]1 year ago
6 0

The equation of the last question which is 3CO2 + 4H2O has a total of 21 atoms with the following number of atoms of each element:

C= 3

C= 3H = 8

C= 3H = 8O = 10.

<h3>What is a chemical formula?</h3>

A chemical formula is defined as the expression that is used to show the chemical symbol of and element in a chemical compound and the number of atoms of those elements.

There are three main type of formula that include the following:

  • Empirical formula : This is the type of chemical formula that shows the simplest whole-number ratio of atoms in a compound.

  • Molecular formula: This is the type of chemical formula that shows the number of each type of atom in a molecule.

  • Structural formula: This is the type of chemical formula that shows how this atoms of each element are bonded together.

The given chemical formula above is a molecular formula that contains the following number of atoms per elements:

C= 3

C= 3H = 8

C= 3H = 8O = 10. Which is a total of 21 ( green)

Learn more about chemical formula here:

brainly.com/question/26388921

#SPJ1

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Answer:

The value of resistance of each resistor, R is 2.25 Ω

Explanation:

Given;

voltage across the three resistor, V = 1.5 V

power dissipated by the resistors, P = 3.00 W

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The effective resistance of the three resistors is given by;

R(effective) = R/3

Apply ohms law to determine the current delivered by the source;

V = IR

I = V/R

I = 3V/R

Also, power is calculated as;

P = IV

P = (3V/R) x V

P = 3V²/R

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R = (3 x 1.5²) / 3

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An airplane flies horizontally with a constant speed of 172.0 m/s at an altitude of 1390 m. A package is dropped out of the airp
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Answer:

(a) - 165.032 m/s

(b) 238.37 m/s

Explanation:

initial horizontal velocity, ux = 172 m/s

height, h = 1390 m

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Let it strikes the ground after time t.

Use second equation of motion in vertical direction

s=ut+\frac{1}{2}at^{2}

-1390 = 0 - 0.5 x 9.8 x t^2

t = 16.84 second

(a) Let vy be the vertical component of velocity as it strikes the ground

Use first equation of motion in vertical direction

vy = uy - gt

vy = 0 - 9.8 x 16.84

vy = - 165.032 m/s

Thus, the vertical component of velocity as it strikes the ground is 165.032 m/s downward direction.

(b)

The horizontal component of velocity remains constant throughout the motion.

vx = 172 m/s

vy = - 165.032 m/s

The resultant velocity is v.

v=\sqrt{172^{2}+165.032^{2}}

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Thus, teh velocity with which it hits the ground is 238.37 m/s.

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