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sp2606 [1]
3 years ago
13

I need help asap :>

Physics
1 answer:
Lena [83]3 years ago
5 0

Answer:

\huge\boxed{\sf v = 0.75\ m / s}

Explanation:

<u>Given Data:</u>

Wavelength = λ = 0.25 m

Frequency = f = 3 Hz

<u>Required:</u>

Speed = v = ?

<u>Formula:</u>

v = fλ

<u>Solution:</u>

v = (3)(0.25)

v = 0.75 m / sec

\rule[225]{225}{2}

Hope this helped!

<h3>~AH1807</h3>
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b. One factor is the height of the fall of the water from the dam. The higher the height the higher the kinetic energy of the water and hence can be converted to higher electric energy. The higher the number of coils of the turbine generator being rotated by the water, the higher the conversion to electric current.


c. One is impoundment. This type is the most common and involves the building of a dam to store water and later the water is released to turn turbines. The second type is diversion. This type does not require a dam. Some water is diverted from the main river to create a pen-stock that runs a turbine.


d. The advantage of hydroelectric power is that is is a clean energy source hence does not cause global warming. Global warming can have economic consequences. The operating cost of this type of plant is low hence the costs of electricity are able to be kept low for the consumers. 2 disadvantage is that creating a dam upstream causes a change in the physical and chemical characteristics of the river or water bodies affecting ecosystems. Another is that electricity is dependent on the water regime hence dependency is tied to climate.


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3 years ago
Which type of cloud would you expect to be involved in some form of precipitation?
fomenos
Stratus clouds maybe
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A 3.0 kg block is pushed by a 14 N force. If µ = 0.6, will the block move?
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Answer:

The block will not move.

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We'll begin by calculating the frictional force. This can be obtained as follow:

Coefficient of friction (µ) = 0.6

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Acceleration due to gravity (g) = 10 m/s²

Normal reaction (R) = mg = 3 × 10 = 30 N

Frictional force (Fբ) =?

Fբ = µR

Fբ = 0.6 × 30

Fբ = 18 N

From the calculations made above, the frictional force of the block is 18 N. Since the frictional force (i.e 18 N) is bigger than the force applied (i.e 14 N), the block will not move.

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3 years ago
A 873-kg (1930-lb) dragster, starting from rest completes a 401.4-m (0.2509-mile) run in 4.945 s. If the car had a constant acce
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To solve this problem it is necessary to apply the kinematic equations of motion.

By definition we know that the position of a body is given by

x=x_0+v_0t+at^2

Where

x_0 = Initial position

v_0 = Initial velocity

a = Acceleration

t= time

And the velocity can be expressed as,

v_f = v_0 + at

Where,

v_f = Final velocity

For our case we have that there is neither initial position nor initial velocity, then

x= at^2

With our values we have x = 401.4m, t=4.945s, rearranging to find a,

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8 0
3 years ago
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Answer:

Los 0.0416km

esto se debe a que transponemos la fórmula acelerada y obtenemos Distancia = velocidad × tiempo

también recuerda transponer los segundos a horas viendo que la velocidad es por hora

También tenga en cuenta que no hablo español, así que esto fue extremadamente difícil

culto

8 0
3 years ago
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