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Nadusha1986 [10]
2 years ago
8

This is 100 points. When i find out how i will put the first person to answer as brainiest.

Physics
1 answer:
grin007 [14]2 years ago
3 0

Answer:

Thank you so much! Have a great day!

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An object acted on by three forces moves with constant velocity. One force acting on the object is in the positive xx direction
Rudik [331]

Answer with Explanation:

We are given that

F_1=6.9 N

F_2=4.5 N

We have to find the direction and magnitude of the third force acting on the object.

Resultant force,F=\sqrt{F^2_1+F^2_2}

F=\sqrt{(6.9)^2+(4.5)^2}=8.24 N

The object moves with constant velocity .Therefore, net force on object is equal to zero

So,Third force,F_3=F=8.24 N

Direction,\theta=tan^{-1}(\frac{F_2}{F_1})

\theta=tan^{-1}(\frac{4.5}{6.9})=33.02^{\circ}

Angle lies in second quadrant because the direction of third force is opposite to the direction of the resultant force of F1 and F2.

Therefore,\theta=\pi-\theta=180-33.02=146.98^{\circ}

8 0
3 years ago
A phase diagram assumes______
PtichkaEL [24]
Choice D, pressure.
8 0
2 years ago
Read 2 more answers
Hello <br>Can anyone help me. ​
labwork [276]

(G)-->Iron and steel industry is called a heavy industry because all the raw material as well as finished goods are heavy and bulky entailing heavy transportation costs. Iron ore, coking coal and limestone are required in the ratio of 4:2:1 approximately. Some quantity of manganese is also required to harden the steel.

(H)-->Sodium is very reactive in nature. When exposed in air, it automatically forms Na2O. When it is put in water it reacts vigorously and starts burning on water. Due to the above reasons Sodium is called an active metal.

(I)-->Down the group, the effective nuclear charge experienced by valence electrons is decreasing because the outermost electrons are far away from the nucleus. Thus, these electrons can be lost easily by the element to form positive ions. Hence, the chemical reactivity of metals increases on going down a group.

(J)-->While moving from top to bottom in a group of the periodic table, the reactivity of non- metals decreases. While moving from top to bottom in a group of non- metals, the atomic size increases with the additional number of shells and the force of attraction between the nucleus and valence shell decreases.

3 0
2 years ago
A nucleus splits to form two or more smaller nuclei during which process?
salantis [7]

Answer:

nuclear fission

7 0
2 years ago
Singing that is off-pitch by more than about 1% sounds bad. How fast would a singer have to be moving relative to the rest of a
Nina [5.8K]

Answer:

-3.396 m/s or 3.465 m/s

Explanation:

v = Speed of sound in air = 343 m/s

v_s = Relative speed of the singer

f = Observed frequency

f' = Actual frequency

1% change can mean f=1.01f'

From the Doppler effect equation we have

f=f'\dfrac{v}{v+v_s}\\\Rightarrow 1.01f'=f'\dfrac{v}{v+v_s}\\\Rightarrow 1.01=\dfrac{343}{343+v_s}\\\Rightarrow v_s=\dfrac{343}{1.01}-343\\\Rightarrow v_s=-3.396\ m/s

The velocity is -3.396 m/s

when f=0.99f'

f=f'\dfrac{v}{v+v_s}\\\Rightarrow 0.99f'=f'\dfrac{v}{v+v_s}\\\Rightarrow 0.99=\dfrac{343}{343+v_s}\\\Rightarrow v_s=\dfrac{343}{0.99}-343\\\Rightarrow v_s=3.46464646465\ m/s

The velocity is 3.465 m/s

3 0
2 years ago
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