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3 years ago

How does energy affect wavelength

Physics

1 answer:

Kazeer [188]3 years ago

8 0

Answer:

The number of complete wavelengths in a given unit of time is called frequency (f). As a wavelength increases in size, its frequency and energy (E) decrease. From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer.

Explanation:

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The moon most likely formed

Paraphin [41]

A from a collision from a mars sized object

3 0

3 years ago

Read 2 more answers

How many miles will a car drive on 25 L of gasoline if the car average mileage is 60 km/gal. provide answer with correct signifi

Hunter-Best [27]

Answer:

Distance traveled by car in 25 L IS 396.15 km

Explanation:

We have given average millage of car = 60 km /gal

Means car travel 60 km in 1 gallon

The amount of gasoline = 25 L

We know that 1 L = 0.2641 gallon

So $25L=25\times 0.2641=6.6025gallon$

As the car travels 60 km in 1 gallon

So traveled distance by car in 6.6025 gallon of gasoline = 60×6.6025 = 396.15 km

4 0

3 years ago

If the mass of the ladder is 12.0 kg, the mass of the painter is 55.0 kg, and the ladder begins to slip at its base when her fee

arsen [322]

Answer:

μ = 0.498

Explanation:

I manage to find the picture of this problem. In the attached picture you can also see the forces involved in this case.

We know according to newton's law that the static friction force is:

Fs = μ * N

However, as you can see in the picture, the Normal force is equals to the weight, in this case the weight of the painter and also the ladder, therefore:

N = Fy

and the force of the friction is:

Fs = Fx

Therefore the coefficient is:

μ = Fx/Fy (1)

Now, let's write the equations in x and y, to solve this.

For the "x" axis:

Fx - Fw = 0 -----> Fx = Fw (2)

Fw is force of the wall, while Fx is the force friction in the x axis (base of the ladder).

for the "y" axis:

Fy - W1 - W2 = 0

W1 = mg (ladder)

W2 = Mg (painter)

replacing we have:

Fy = W1 + W2

Fy = mg + Mg ----> Fy = g(m + M) (3)

To get the force that the wall is exerting we need to calculate the torque around the foot of the ladder so:

τ = rF sinθ

However, the angle in the wall and the ladder is 90° so:

τ = rF sin90°

τ = rF (4)

replacing (4) with the forces we have:

rFw = rW1 + rW2

4Fw = 1.5mg + 2.1Mg

Fw = 1.5mg + 2.1Mg/4 (5)

Finally, with this expression, we can replace it in (1) to get the coefficient of friction:

μ = Fx/Fy

μ = 1.5mg + 2.1Mg / 4g(m + M) gravity cancels out so:

μ = 1.5m + 2.1M / 4(m + M)

Replacing the data we finally have:

μ = (1.5 * 2) + (2.1 * 55) / 4 (55 + 12)

μ = 133.5 / 268

3 0

3 years ago

As friends frequently do, Josh and John stand at either end of a very long, stationary skateboard, with Josh at the front and Jo

denis-greek [22]

Answer:

B. Forward

Explanation:

The net force in the system is initially balanced and the system is in equilibrium.

1) As John ducks, two things happens. First, there is a sudden impulse from his end which will change the momentum of the system from zero to an amount Mv proportional to the impulse Ft, which will be directed away from his direction because,

2) the process of ducking pushes his center of mass forward, which also moves the center of mass of the whole system away from him. This two effect will cause the skateboard to move forward.

4 0

3 years ago

In order to keep a leaking ship from sinking, it is necessary to pump 12.0 lb of water each second from below deck up a height o

mr Goodwill [35]

Answer:

P = 0.14 hp

Explanation:

The power required by the ship is given as:

$P = \frac{Work}{Time} = \frac{Potential\ Eenrgy}{t}\\\\P = \frac{mgh}{t}$

where,

P = Power = ?

m = mass to pump = (12 lb)(1 kg/2.20 lb) = 5.44 kg

g = acceleration due to gravity = 9.81 m/s²

h = height = 2 m

t = time = 1 s

Therefore,

$P = \frac{(5.44\ kg)(9.81\ m/s^2)(2\ m)}{1\ s}\\\\P = 106.8\ W$

Converting to horsepower (hp):

$P = (106.8\ W)(\frac{1\ hp}{746\ W})$

3 0

3 years ago