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3 years ago

What’s the formula for wavelength?

Physics

2 answers:

omeli [17]3 years ago

5 0

Answer:

Hi names Sergeant von , Wavelength can be calculated using the following formula: wavelength = wave velocity/frequency. Wavelength usually is expressed in units of meters. The symbol for wavelength is the Greek lambda λ, so λ = v.

Explanation:

Im sorry if im wrong im not the best at this stuff

but the distance between the crests of a wave. Wavelength is represented with the Greek letter lambda: λ. It is equal to the velocity of the wave, divided by the frequency.:)

arsen [322]3 years ago

3 0

Wavelength = speed *time

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Yuri [45]

Answer: C. the rod gains mass and the fur loses mass.

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4 years ago

The first law of motion is also called as law _ fill up the blanks

Roman55 [17]

Answer:

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3 years ago

If the object starts at point A what is the total energy of the system?

Oxana [17]

The total energy of the system is 88.2 J

Explanation:

The total (mechanical) energy of an object is given by:

$E=PE+KE$

where

PE is the potential energy

KE is the kinetic energy

At the starting point, the object is at rest: this means that its kinetic energy is zero, so all its energy is potential energy, which is given by

$PE=mgh$

where

m is the mass of the object

g is the acceleration of gravity

h is the height of the object

In this problem, we have (at point A):

m = 3.0 kg

$g=9.8 m/s^2$

h = 3.0 m

Substituting, we find:

$E=U=(3.0)(9.8)(3.0)=88.2 J$

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3 years ago

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Allushta [10]

Answer:

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3 years ago

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Salmon often jump waterfalls to reach their breeding grounds. Starting downstream, 2.33 m away from a waterfall 0.488 m in heigh

Ulleksa [173]

Answer:

5.68 m/s

Explanation:

The motion of the salmon is the same as a projectile: it is launched with an initial speed $u$ at an angle of $\theta=38^{\circ}$ above the horizontal.

The motion of the salmon consists of two indipendent motion:

- Along the horizontal direction, it is a uniform motion with constant velocity

$v_x = u cos \theta$

So that the distance travelled is

$d=v_x t = u cos \theta t$ (1)

- Along the vertical direction, it is a uniformly accelerated motion with constant acceleration downward, so the vertical displacement is

$y = u sin \theta t - \frac{1}{2}gt^2$ (2)

where g is the acceleration of gravity.

We know the following:

- The horizontal distance travelled by the salmon to reach the waterfall is

d = 2.33 m

- The vertical distance travelled is the height of the waterfall,

y = 0.488 m

From (1) we get:

$t=\frac{d}{u cos \theta}$

And substituting into (2), we can solve the equation to find t, the time at which the salmon reaches the waterfall:

$y = u sin \theta \frac{d}{u cos \theta} - \frac{1}{2}gt^2 = d tan \theta - \frac{1}{2}gt^2\\t = \sqrt{\frac{2(d tan \theta - y)}{g}}=\sqrt{\frac{2(2.33 tan 38^{\circ}-0.488)}{9.81}}=0.521 s$

And then, we can use eq.(1) again to find the initial speed, u:

$u=\frac{d}{cos \theta t}=\frac{2.33}{cos(38^{\circ})(0.521)}=5.68 m/s$

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3 years ago