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Sunny_sXe [5.5K]
3 years ago
12

Help with atomic mass

Physics
2 answers:
gizmo_the_mogwai [7]3 years ago
8 0
I did the boron

Phosphorus-
Atomic number: 15
Atomic mass: 30.974
Number of protons: 15
Number of electrons: 15
Number of neutrons: 15



Potassium-
Atomic number: 19
Atomic mass: 39.098
Number of protons: 19
Number of electrons: 19
Number of neutrons: 20


Carbon-
Atomic number: 6
Atomic mass: 12.011
Number of protons: 6
Number of electrons: 6
Number of neutrons: 6


Hope this helps

-Zayn Malik
Dafna1 [17]3 years ago
3 0

Explanation:

what?? do you please say clearly

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A ball is thrown vertically upward with a speed of 27.9 m/s from a height of 2.0 m. How long does it take to reach its highest p
Bas_tet [7]

Answer:

2.84403 seconds

2.91483 seconds

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s²

v=u+at\\\Rightarrow t=\frac{v-u}{a}\\\Rightarrow t=\frac{0-27.9}{-9.81}\\\Rightarrow t=2.84403\ s

It takes 2.84403 seconds to reach the highest point

v^2-u^2=2as\\\Rightarrow s=\frac{v^2-u^2}{2a}\\\Rightarrow s=\frac{0^2-27.9^2}{2\times -9.81}\\\Rightarrow s=39.67431 m

The ball will travel 39.67431+2 = 41.67431 m while going down to the ground

s=ut+\frac{1}{2}at^2\\\Rightarrow 41.71479=0t+\frac{1}{2}\times 9.81\times t^2\\\Rightarrow t=\sqrt{\frac{41.67431\times 2}{9.81}}\\\Rightarrow t=2.91483\ s

The ball takes 2.91483 seconds to hit the ground after it reaches its highest point.

6 0
3 years ago
Which of the following are examples of both projectile motion and 2-dimensional motion?
Elanso [62]

Answer:

A

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5 0
3 years ago
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I need help with this question. Anyone?
cluponka [151]
The closest answer i would go with is b, I'm not completely sure because I'm not sure what the question actually means because there could be any meaning 
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3 years ago
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Different Betweens in Current Source And Voltage Source.
ira [324]

Answer:

The various types of sources available in the electrical network are voltage source and current sources. A voltage source has a forcing function of emf whereas the current source has a forcing function of current.

4 0
2 years ago
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Nasa has developed deep-space 1 (ds-1), a spacecraft that is scheduled to rendezvous with the asteroid named 1992 kd (which orbi
andrezito [222]
I can't give an exact number if the original velocity of ds-1 is not given. In that case, the final answer should just be in terms of an equation. Let's denote the original velocity to be v₀ and the days to be d.

Part a.)
v = v₀ + 9.23d
3440 = v₀ + 9.23d
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d = (3,440 - v₀)/9.23

Part b.)

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