Answer:
Explanation:
For this case we have the initial height given:
above the water
We know that the total time from the initial point and the end point it's
So we can use this kinematic formula in order to find the time to travel from the original height to the surface of the water:
We assume that the initial velocity is 0, the final height since it's at the surface so it would be 0m, the acceleration for this case would be the gravity and negative since it's acting downward, replacing we have this:
And solving for t1 we got:
Now we can find the velocity at the surface of the water like this:
Since we know that the total time from the begin and the end it's 5 s and from the calculation before we know that the time to reach the surface of the water is 1.01 s, then the time between the surface of the water and the final depth of the water is 5-1.01= 3.99 s
And then we can find the depth of the lake (D) using the formula for constant velocity like this:
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Calculate wavelength with the wavelength equation.
Use the correct units.
Plug the known quantities into the equation and solve.
Use this equation to solve for speed or frequency.
Calculate wavelength with the energy equation.
Answer:
Total displacement will be 1120 meters.
Explanation:
To calculate displacement from the velocity, need to take integral of velocity for a one time period.
The total displacement is 1120 meter in negative way.
Answer:
E) microwave, infrared, visible, ultraviolet
Explanation:
Electromagnetic waves are waves consisting of oscillations of electric and magnetic fields. These fields oscillate in a direction perpendicular to the direction of propagation of the wave, so they are called transverse waves. Electromagnetic waves are the only waves that can travel in a vacuum, since they don't need a medium to propagate.
Electromagnetic waves are classified into 7 different types, according to their different frequency. In order from lowest to highest frequency, we have:
Radio waves
Microwaves
Infrared
Visible light
Ultraviolet
X-rays
Gamma rays
Moreover, for an electromagnetic wave the energy carried is proportional to its frequency:
where h is the Planck constant and f is the frequency. Therefore, the list written above also corresponds to the list of waves from lowest to highest energy. so, the correct answer is
E) microwave, infrared, visible, ultraviolet