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Lerok [7]
2 years ago
15

10. Wet-cell and Dry-cell batteries have _______ current.

Physics
2 answers:
sasho [114]2 years ago
7 0
The correct answer is a direct current
Arturiano [62]2 years ago
5 0

Answer:

A

Explanation:

Direct because it's still passes electricity through ir

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Answer:

1 both increase

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3 the kinetic energy is higher in the larger vehicle as they have the same speed

Explanation:

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Explain how wind is the primary source for wave energy
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Waves get their energy from the wind.
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An object oscillates with an angular frequency of 8.0 rad/s. At t = 0, the object is at x0 = 4 cm with an initial velocity v0 =
KatRina [158]

Answer:

\phi = 0.66 rad

A = 5.06 cm

Explanation:

We have here a simple harmonic motion, so the equation of the position in this motion is:  

x(t)=Acos(\omega t+\phi) (1)

A: Amplitude

ω: angular frequency

φ: phase constant

If we take the derivative of x with respect to t from (1), we can find the velocity equation of this motion:

v(t)=\frac{dx(t)}{dt}=-A\omega sin(\omega t+\phi) (2)

Let's evaluate (1) and (2) in t=0.

x(0)=Acos(\phi) (3)

v(0)=-A\omega sin(\phi) (4)

Dividing 4 by 3 we have:

\frac{v(0)}{x(0)}=-\omega tan(\phi)

\phi = tan^{-1}(\frac{-v(0)}{\omega x(0)})

\phi = 0.66 rad

Now, using (3) we can find the amplitude.

A = \frac{x(0)}{cos(\phi)} = 5.06 cm

I hope it helps!                            

6 0
4 years ago
A rod of length L is pivoted about its left end and has a force F applied perpendicular to the other end. The force F is now rem
timurjin [86]

Answer:

F' = 4F

Explanation:

When force applied to the end of the rod in perpendicular direction then net torque on the rod is given as

\tau = L F sin90

\tau = LF

Now another force is applied at mid point of the rod at an angle of 30 degree with the rod

so new value of torque is given as

\tau = \frac{L}{2}F' sin\theta

LF = \frac{L}{2}F' sin30

LF = \frac{F'L}{4}

so we have

F' = 4F

3 0
3 years ago
Stronauts in space need to communicate with each other by radio links because
dybincka [34]

Answer:

Because there is nothing out in space , the sound waves from one astronaut's whistling can't travel over to the other astronaut's ears.

7 0
3 years ago
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