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dimaraw [331]
3 years ago
5

Number of atoms of each element ammonium hydroxide?​

Physics
2 answers:
Luba_88 [7]3 years ago
8 0

Answer:

Explanation:

Ammonium Hydroxide has the chemical formula of

NH4OH

There is 1 Nitrogen (N) = 1

There are 5 Hydrogens (H) = 5

There is 1 Oxygen  (O) = 1

In total, there are 7 atoms in 1 molecule of NH4OH

quester [9]3 years ago
7 0
Hydrogen H 5
Nitrogen N 1
Oxygen O 1
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A 2.98 nF parallel-plate capacitor is charged to an initial potential difference of 49 V and then isolated. The dielectric mater
I am Lyosha [343]

Answer:

Potential difference will be 151.9 volt  

Explanation:

We have given capacitance of the capacitor C=2.98nF=2.98\times 10^{-9}F

Voltage V = 49 Volt

Dielectric constant K = 3.1

We have to find the potential difference

We know that when a dielectric medium is introduced then p[otential difference is increases by k times

As the dielectric constant k = 3.1

So potential difference will be = 3.1×49 = 151.9 volt

8 0
3 years ago
Read 2 more answers
A boy throws a baseball onto a roof and it rolls back down and off the roof with a speed of 3.05 m/s. If the roof is pitched at
vekshin1

1) Time in the air: 0.78 s

The motion of the ball is a projectile motion, which consists of two independent motions:

- A horizontal motion with constant horizontal velocity

- A vertical motion with constant downward acceleration of

g=-9.8 m/s^2 (acceleration of gravity)

The initial vertical velocity is

u_y = u sin \theta = (3.05)(sin(-40^{\circ}))=-1.96 m/s

where the negative sign means the direction is downward.

The vertical position of the ball is given by

y(t) = h + u_y t + \frac{1}{2}gt^2

where

h = 4.50 m is the initial heigth of the ball when it starts falling down

The ball reaches the ground when y = 0, so we have:

0 = 4.50 -1.96t-4.9t^2

This is a second-order equation; solving for t, we get

t = -1.18 s

t = 0.78 s

We discard the negative solution since it has no physical meaning, so we can say that the ball spent 0.78 s in the air.

2) Horizontal distance: 1.83 m

For this second part of the problem, we just have to consider the horizontal motion of the ball.

As we said previously, the motion of the ball along the horizontal direction is a uniform motion with constant velocity, which is given by

v_x = u cos \theta = (3.05)(cos (-40.0^{\circ}))=2.34 m/s

where u = 3.05 m/s is the initial speed and \theta the angle of projection.

For a uniform motion, we can use the following relationship between distance covered and velocity:

d=v_x t

and substituting t = 0.78 s, we find the total distance travelled along the horizontal direction by the ball before reaching the ground:

d=(2.34)(0.78)=1.83 m

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3 years ago
ANSWER ASAP PLZZZZ!!!!!!!!
igor_vitrenko [27]

Answer: your correct answer is a i took the test

Please i need brainlist i need one more and i level up :)

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