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Karolina [17]
3 years ago
15

Some plants disperse their seeds by having the fruit split and contract, propelling the seeds through the air. The trajectory of

these seeds can be determined by using a high-speed camera. In one type of plant, seeds are projected at 20 cm above ground level with initial speeds between 2.3 m/s and 4.7 m/s . The launch angle is measured from the horizontal, with +90∘ corresponding to an initial velocity straight upward and −90∘ straight downward.
Physics
1 answer:
Pani-rosa [81]3 years ago
3 0

Answer: 23000 frames/s

Explanation:

The rest of the statement of the question is presented below:

The experiment is designed so that the seeds move no more than 0.20 mm between photographic frames. What minimum frame rate for the high-speed camera is needed to achieve this?

We know the <u>maximum initial speed</u> at which the seeds are dispersed is:

V_{i}=4,7 m/s

In addition, we know the <u>maximum distance</u> at which the seeds move between photographic frames is:

d_{max}=0.20 mm \frac{1m}{1000 m}=0.0002 m

And we need to find the minimum frame rate of the camera with these given conditions. This can be found by finding the time t for each frame and then the frame rate:

Finding the time:

t=\frac{d_{max}}{V_{i}}

t=\frac{0.0002 m}{4.6 m/s}

t=0.00004347 s/frame This  is the time for each frame

Now we need to find the frame rate, which is the frequency at which the photos are taken.

In this sense, frequency f is defined as:

f=\frac{1}{t}

f=\frac{1}{0.00004347 s/frame}

Finally:

f=23000 frames/s

Hence, the minimum frame rate is 23000 frames per second.

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alexgriva [62]
Voltage = current * resistance
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5 0
3 years ago
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For a certain RLC circuit the maximum generator EMF is 125 V and the maximum current is 3.20 A. If le a) the impedance of the ci
MAXImum [283]

Answer:

Part (i)

Z = 39.06 ohm

Part (ii)

R = 21.7 ohm

Explanation:

a) here we know that

maximum value of EMF = 125 V

maximum value of current = 3.20 A

now by ohm's law we can find the impedence as

z = \frac{V_o}{i_o}

now we will have

z = \frac{125}{3.20} = 39.06 ohm

Part b)

Now we also know that

\frac{R}{z} = cos\theta

\theta = 0.982 rad = 56.3 degree

now we have

\frac{R}{39.06} = cos56.3

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5 0
3 years ago
Every motor vehicle registered in a foreign jurisdiction and every motorcycle registered in this state must be equipped with a m
xenn [34]

Answer:

200 feet

Explanation:

According to my research on the studies conducted by motor vehicles safety professionals, It is said that based on the information provided within the question the driver needs a mirror in which he/she is able to view the roadway 200 feet to the rear of the vehicle. This is a safety precaution which allows the driver a broader environmental awareness leading to less accidents.

I hope this answered your question. If you have any more questions feel free to ask away at Brainly.

3 0
3 years ago
Bob and John are pulling in different directions. If Bob is pulling to the right with a force of 10N, and John is pulling to the
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Answer:

A) -2N

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Answer:

Explanation:

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Use first equation of motion for rotational motion

ω = ωo + αt

ω = 0 + 30.5 x 9

ω = 274.5 rad/s

v = rω

v = 0.120 x 274.5

v = 32.94 m/s

8 0
3 years ago
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