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jeka94
3 years ago
12

An object is released from a rocket moving upwards at a speed of 8.9 m / s.​

Physics
1 answer:
Usimov [2.4K]3 years ago
8 0

Answer:

9.81 m/s²

Explanation:

It is given that the upward speed of the object is 8.9 m/s.

An object is released.

Now, we know that if the object is released then it will move under the control of gravity which means that the initial velocity of the rocket will not affect the acceleration of the object.

Hence, the downward acceleration of the object will be equal to g i.e. 9.81 m/s².

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What are the three rules for writing the electron configuration of elements
astraxan [27]

<em></em>

Answer:

<u><em>The aufbau principle</em></u>

<u />

<u><em>The Pauli exclusion principle</em></u>

<u><em></em></u>

<u><em>Hund's rule of maximum multiplicity</em></u>

Explanation:

<u><em>The aufbau principle:</em></u>

<em></em>

The fundamental electronic configuration is achieved by placing the electrons one by one in the different orbitals available for the atom, which are arranged in increasing order of energy.

<u><em>The Pauli exclusion principle:</em></u>

<em></em>

Two electrons of the same atom cannot have their four equal quantum numbers.  Because each orbital is defined by the quantum numbers n, l, and m, there are only two possibilities ms = -1/2 and ms = +1/2, which physically reflects that each orbital can contain a maximum of two electrons, having opposite spins

<u><em>Hund's rule of maximum multiplicity:</em></u>

This rule says that when there are several electrons occupying degenerate orbitals, of equal energy, they will do so in different orbitals and with parallel spins, whenever this is possible.  Because electrons repel each other, the minimum energy configuration is one that has electrons as far away as possible from each other, and that is why they are distributed separately before two electrons occupy  the same orbital.

4 0
3 years ago
What is a good example of a contact force?
exis [7]

Answer:

Sitting on a couch

Explanation:

The couch is exerting an upwards force so that would make it a contact force

5 0
4 years ago
How did researchers go about investigating trans-sonic flight
Annette [7]

<span>A wind tunnel is a traditional tool used for trans-sonic flight research. But, during those days, it’s not exact and consistent to use for aircraft flow conditions. The reason is that wind tunnel models will be visible to airflow that produces shock waves. So the U.S and Britain develop an instrument to get data and record flow conditions for a specified speed, these are the specialized research airplanes.</span>

6 0
3 years ago
The practical limit to an electric field in air is about 3.00 × 10^6 N/C . Above this strength, sparking takes place because air
AleksAgata [21]

Answer:

(a) x=157 m

(b) No

Explanation:

Given Data

Mass of proton m=1.67×10⁻²⁷kg

Charge of proton e=1.6×10⁻¹⁹C

Electric field E=3.00×10⁶ N/C

Speed of light c=3×10⁸ m/s

For part (a) distance would proton travel

Apply the third equation of motion

(v_{f})^{2} =(v_{i})^{2}+2ax

In this case vi=0 m/s and vf=c

so

c^{2}=(0)^{2}+2ax\\  c^{2}=2ax\\x=\frac{c^{2} }{2a}

x=\frac{c^{2}}{2a}--------Equation (i)

From the electric force on proton

F=qE\\where\\ F=ma\\so\\ma=qE\\a=\frac{qE}{m}\\

put this a(acceleration) in Equation (i)

So

x=\frac{c^{2} }{2(qE/m)}\\ x=\frac{mc^{2}}{2qE} \\x=\frac{(1.67*10^{-27})*(3*10^{8})^{2}  }{2*(1.6*10^{-19})*(3*10^{6})}\\ x=157m

For part (b)

No the proton would collide with air molecule

7 0
3 years ago
Dereck is looking at how electrically charged objects can attract other objects without touching. What control would he need to
Zigmanuir [339]

Answer:

the same

Explanation:

3 0
4 years ago
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