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2 years ago

California has been spending money to establish desalination plants. The state is preparing for

Physics

1 answer:

Stella [2.4K]2 years ago

4 0

Extracting saltine from the water.

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Which is a property of the group highlighted in the periodic table?

puteri [66]

D. They all four have valence electrons

3 0

2 years ago

A 4.76 kg crate is suspended from the end of a short vertical rope of negligible mass. An upward force F(t) is applied to the en

Romashka-Z-Leto [24]

Answer:

The magnitude of the force is 64.634 newtons.

Explanation:

According to the statement, the crate is a constant mass system, whose upward force is described by the following expression:

$F(t) = m\cdot \ddot{y} (t)$ (1)

Where:

$F(t)$ - Force, in newtons.

$m$ - Mass, in kilograms.

$\ddot {y}(t)$ - Acceleration, in meters per square second.

The function acceleration is obtained by deriving the function position twice in time:

$\dot y (t) = 2.80 + 1.83\cdot t^{2}$ (2)

$\ddot y(t) = 3.66\cdot t$ (3)

And we expand (1) by applying (3):

$F(t) = 3.66\cdot m \cdot t$

Where $t$ is the time, in seconds.

If we know that $m = 4.76\,kg$ and $t = 3.71\,s$ , then the magnitude of the force is:

$F = 3.66\cdot (4.76)\cdot (3.71)$

$F = 64.634\,N$

The magnitude of the force is 64.634 newtons.

6 0

3 years ago

A plane progressive

kiruha [24]

Answer:

Amplitude, A = 5 m

Explanation:

Let a progressive wave is given by equation :

$y=5\sin (100\pi t-0.4\pi x)$ .....(1)

The general equation of a progressive wave is given by :

$y=A\sin (\omega t-kx)$ ....(2)

Here,

A is the amplitude of the wave

$\omega$ is the angular frequency

k is propagation constant

We need to find the amplitude of the wave.

If we compare equations (1) and (2), we find that the amplitude of the given plane progressive wave is 5 m.

4 0

3 years ago

Which amendment deals with state rights

lilavasa [31]

Answer:

The Tenth Amendment

Explanation:

It supports states rights. it is apart of the "bill of rights". it expresses the federalism and state rights. It explains the the United states of Government is made this amendments to protect do the state rights. What people want.

3 0

2 years ago

Sam is walking through the park. He hears a police car coming down the street toward him. What happens to the sound of the siren

geniusboy [140]

I believe it is the first one.
This is because of the Doppler Effect.
The Doppler Effect is when the frequency of the wave changes for an observer moving relative to the wave source.
Basically, as the police car moves away from you, the distance between you and the car increases, which makes the sound waves spread out.

8 0

2 years ago

Read 2 more answers