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leva [86]
3 years ago
11

I need help with this

Physics
1 answer:
lord [1]3 years ago
7 0

Answer:

0.832

Explanation:

8.320 x 10 to the negative 1st power is 0.832

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A 26 kg body is moving through space in the positive direction of an x axis with a speed of 350 m/s when, due to an internal exp
Gnom [1K]

Answer:

a.) 1567.2 m/s

b.) 149.4 m/s

Explanation:

Given that a 26 kg body is moving through space in the positive direction of an x axis with a speed of 350 m/s when, due to an internal explosion, it breaks into three parts. One part, with a mass of 7.8 kg, moves away from the point of explosion with a speed of 180 m/s in the positive y direction. A second part, with a mass of 8.8 kg, moves in the negative x direction with a speed of 640 m/s.

The x-component of the third part can be calculated by assuming that it moves in a positive x axis.

The third mass = 26 - ( 7.8 + 8.8)

The third mass = 26 - 16.6

The third mass = 9.4kg

since momentum is conserved, the momentum before explosion will be equal to sum of the momentum after explosion

26 x 350 = -8.8 x 640 + 9.4V

9100 = -5632 + 9.4V

9.4V = 9100 + 5632

9.4V = 14732

V = 14732/9.4

V = 1567.2 m/s

(b) y-component of the velocity of the third part will be

7.8 x 180 = 9.4 V

1404 = 9.4V

V = 1404/9.4

V = 149.4 m/s

7 0
2 years ago
The spectrum of light emitted by helium atoms is different than that emitted by hydrogen atoms because
MaRussiya [10]
<h3><u>Answer;</u></h3>

The different atoms have different quantized energy levels

<h3><u>Explanation;</u></h3>
  • The atoms of different elements have different energy levels because they have different nuclear charges and spins, and different numbers of electrons.
  • Each different kind of atom, like hydrogen or radon, has a distinct nuclear charge and number of electrons. This makes the potential energy function different for each atom, and therefore results in different energy levels.
  • In an emmission spectra, each bright band corresponds to a difference between energy levels within the atom.
4 0
3 years ago
I don't understand how to get 50000 ohms, please can someone help? I would have just left my answer at 25,000 ohms!
pochemuha
I think this is shown in the fine print on the second sheet . . .


The question starts out by saying that the scale uses <u>two</u> 3V cells <u>in series</u>.
That makes the total battery voltage 6 volts.

0.12 milliamperes = 0.00012 Amperes.

Resistance = (voltage) / (current in Amperes).

Resistance = 6 / 0.00012 = 50,000 Ω






8 0
3 years ago
Which are the simplest pure substances that cannot be broken down into any other substances
maria [59]
A substance that cannot be decomposed (broken down) into simpler substances by ordinary chemical means. Examples: gold, iron, carbon, hydrogen, oxygen, nitrogen.
3 0
3 years ago
at 1 kilometer per year , how many centuries would it take for people to move from africa to china which is 10,000 kilometers aw
iren2701 [21]
100 years are in 1 century
so if its moving 1km per year that means it would take 10,000 years and to make that into centuries you would divide 10,000 by 100
it would take 100 centuries
3 0
3 years ago
Read 2 more answers
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