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ruslelena [56]
3 years ago
14

Recognizing forms of energy

Physics
2 answers:
sergey [27]3 years ago
8 0
The question is missing
Gnoma [55]3 years ago
7 0

Answer:

hi the question isn't obvious and need a photo I guess

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A surfer paddles out beyond the breaking surf to where waves are sinusoidal in shape, with crests 59.6 m apart. The surfer bobs
katrin [286]

Answer: y(x, y) = 2.14cos(6.04x - 8.29t)

wave speed (v) =1.38m/s,

wavelength ( λ) =59.6m

Amplitude (A) =2.14m

Wave number (k) =6.04

Angular frequency (ω) = 8.29rad/s

Explanation:

The wavelength is simply defined as the distance between 2 successive crest or trough.

From the question it has been stated that the crest are 59.6m apart, thus (λ) =59.6m.

The wave travels a total vertical distance of 4.28m, this simply implies that along the vertical axis of the sine graph, the wave traveled from maximum displacement to the positive y axis (+A) through the center (o) and to the maximum displacement to the negative axis (-A).

Meaning total vertical distance =2A where A=Amplitude

This amplitude is 4.28/2 = 2.14m

Wave number (k) =2π/(λ)

Where π=180°

Thus, k=2*180/59.6

K=360/59.6

K=6.04

To get the angular frequency of the wave(ω), we use the formulae above

(ω)=kv

Where v is the wave speed

v=vertical distance/time taken

v= 4.28/3.09= 1.31m/s

Thus

(ω)=kv=6.04 * 1.31 =8.29rad/s.

Equation of wave is below

y(x,t)=Acos(kx−ωt)

By slotting in the parameters we have that

y(x, y) = 2.14cos(6.04x - 8.29t)

Above is the mathematical equation that describes the wave.

3 0
3 years ago
A flea jumps by exerting a force of 1.27 10-5 N straight down on the ground. A breeze blowing on the flea parallel to the ground
Scilla [17]
Since force is a vector quantity, we can find the net force by determining the resultant force. The equation is written below:

F = √(Fx²)+(Fy)²
where 
Fx is the force parallel to the ground
Fy is the downward force
F = √(1.2×10⁻⁶ N)²+(1.27×10⁻⁵ N)²
F = 1.2788×10⁻⁵ N

Then, we apply Newton's second law of motion.
F = ma
a = F/m = 1.2788×10⁻⁵ N/(6×10⁻⁷ kg)
a = 21.31 m/s²

<em>The magnitude of the acceleration is 21.31 m/s². The direction is shown in the picture, which is headed towards southeast.</em>

8 0
4 years ago
A moving car has 2000 J of kinetic energy. If the speed doubles, how much kinetic energy would it have?
oee [108]
Given,
Kinetic energy of the car = 2000 J
speed of the car is doubled
we know,

now, speed of the car is doubled
v' = 2 v


Using

=1/22


Hence, the Kinetic energy would be equal to 8000 J.
7 0
3 years ago
Explain how wind is the primary source for wave energy
siniylev [52]
Waves get their energy from the wind.
8 0
3 years ago
Read 2 more answers
Một oto đang chạy với vận tốc là 10m/s thì tăng tốc và chuyển động nhanh dần đều sau 20s thì đạt vận tốc 14m/s
Tasya [4]

a) gia tốc = vf-vi / t

a = 14-10 / 20

a = 0,2ms⁻²

b) dưới dạng a = Δv / t

v = lúc

v = 0,2 × 40

v = 8ms⁻¹

như v = d / t

do đó d = vt

d = 8 × 40

d = 320m

hãy đánh dấu là trí óc nhất

4 0
3 years ago
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