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natita [175]
3 years ago
11

Underwater sound detecting system​

Physics
2 answers:
yarga [219]3 years ago
3 0

Answer:

sonar I believe.

-Dominant- [34]3 years ago
3 0

sonar is the underwater detecting system.

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A rod 14.0 cm long is uniformly charged and has a total charge of -22.0 μC. Determine the magnitude and direction of the net ele
lesya692 [45]

Explanation:

It is given that,

Length of the rod, l = 14 cm = 0.14 m

Charge on the rod, q=-22\ \mu C=-22\times 10^{-6}\ C

We need to find the magnitude and direction of the net electric field produced by the charged rod at a point 36.0 cm to the right of its center along the axis of the rod, z = 36 cm = 0.36 m

Electric field at the axis of the rod is given by :

E=\dfrac{\lambda}{2\pi \epsilon_o z}

Where

\lambda is the linear charge density of the rod,

\lambda=\dfrac{q}{l}=\dfrac{-22\times 10^{-6}\ C}{0.14\ m}=-0.00015\ C/m

E=\dfrac{-0.00015}{2\pi\times 8.85\times 10^{-12}\times 0.36}

E = -7493170.57 N/C

or

E=-7.49\times 10^6\ N/C

Negative sign shows that the electric field is acting in inwards direction. Hence, this is the required solution.

4 0
3 years ago
A 2.00-kg, frictionless block is attached to an ideal spring with force constant 300 N/mN/m. At t=0 t=0 the block has velocity -
slega [8]

Answer:

The amplitude of the spring is 32.6 cm.

Explanation:

It is given that,

Mass of the block, m = 2 kg

Force constant of the spring, k = 300 N/m

At t = 0, the velocity of the block, v = -4 m/s

Displacement of the block, x = 0.2 mm = 0.0002 m

We need to find the amplitude of the spring. We know that the velocity in terms of amplitude and the angular velocity is given by :

v=\omega\sqrt{A^2-x^2}

\omega=\sqrt{\dfrac{k}{m}}

\omega=\sqrt{\dfrac{300}{2}}    

\omega=12.24\ rad/s

So, \dfrac{v^2}{\omega^2}+x^2=A^2

\dfrac{(-4)^2}{(12.24)^2}+(0.0002)^2=A^2            

A = 0.326 m

or

A = 32.6 cm

So, the amplitude of the spring is 32.6 cm. Hence, this is the required solution.

4 0
3 years ago
A 56-N net force acting on a cart accelerates it at a rate of 0.5 m/s/s. What is the mass of the cart
Anuta_ua [19.1K]

Answer:

F = m × a = 50 kg × 0.8 m/s2 = 40 kg • m/s2, or 40 N

Explanation:

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3 years ago
A blank is used to control the temperature in a room, please help
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Thermostat is used to control the temperature in a room

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