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3 years ago

A bird flies at an average velocity of 3.60 m/s for 18.4 s. How far does it travel? (unit=m)

1 answer:

5 0

First, you have to write what you know:

V = 3.60 m/s
D = ?
T = 18.4 s

Next, you plug everything into this formula:

V = D/T
3.60 m/s = ?/18.4 s

Then, you multiply 3.60 m/s and 18.4 s

D = 66.24 m

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A biological cycle, or rhythm, that is approximately 25 hours long is called

Anni [7]

Answer: Circadian Rhythms

There are three types of biological rhythms.

→The one that occurs about every day (approx 24 hours) is known as Circadian Rhythms. For example, Hormone secretion, urine production, sleep etc.

→The one that occurs after more than a day like menstrual cycles of women (28 days) is known as Infradian Rhythms.

→The one that occurs more than once a day is known as Ultradian Rhythms like sleep, hormone levels etc.

Therefore, a biological cycle that is approximately 25 hours long is called Circadian Rhythms.

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4 years ago

A golf ball is sitting on a tee. The ball is struck with a golf club and flies

Mrrafil [7]

Answer:

c i kn now it is

Explanation:

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3 years ago

Read 2 more answers

Why is measuring the duration of a number of swings a better way to determine the period of a pendulum than by measuring a singl

Alekssandra [29.7K]

Answer:

It is to reduce the expected relative error of the measurement.

Explanation:

If there was a way to measure without error, this method would be unnecessary. In practice, the pesky error is always there. The sources are varied: inexact instrument, small inaccuracies in starting/stopping the timer, etc. But, it is reasonable to assume that such an error is random and has an expected spread that is <em>independent</em> of the actual duration of measurement. Under such assumptions, the methods offers a great advantage:

Let ε denote an additive measurement error. Let the error be random, symmetric (negative/positive), distributed in some fixed range independent of the actual measured value. The error represents an additive component in our measurement, i.e., (measurement) = (true value) + (error). In the case of one period T, we get to measure the duration T':

$T' = T + \epsilon$

so the relative error is

$\frac{|T'-T|}{T}=\frac{|T+\epsilon-T|}{T}=\frac{|\epsilon|}{T}$

In a separate experiment, suppose you measure n periods. Same error applies:

$T_n'=n\cdot T+\epsilon$

we can get a single period by dividing the measured value by n:

$\frac{T_n'}{n}=\frac{n\cdot T +\epsilon}{n}=T+\frac{\epsilon}{n}$

and the relative error of such a result will be:

$\frac{|T+\frac{\epsilon}{n}-T|}{T}=\frac{|\epsilon|}{n\cdot T}$

which is n times smaller than the relative error of the single measurement above. The more periods are included in the measurement, the smaller the expected error!

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3 years ago

Olivia is on a swing at the playground.

balu736 [363]

Olivia is on a swing at the playground. The kinetic energy is increasing and her potential energy decreasing at point X.

<h3>What is kinetic energy and potential energy?</h3>

The kinetic energy of an object is the ability to do work by virtue of its motion and potential energy is the ability to do work by virtue of its position.

At point W and Z, Olivia is at the maximum displacement from the mean position, where kinetic energy is zero and potential energy is maximum.

At point Y, it is approaching to increase its potential energy and decreasing kinetic energy. Opposite to this, at point X, kinetic energy is increasing and potential energy is decreasing.

Thus, the kinetic energy is increasing and her potential energy decreasing at point X.

Learn more about kinetic energy and potential energy.

brainly.com/question/15764612

#SPJ1

5 0

3 years ago

A Morrison’s fuel truck is traveling at a speed of 5 miles per hour for 5 minutes what distance does it travel?

madam [21]

Answer: 2,200 feet

<u>Explanation:</u>

Use the following conversions: 1 mile = 5280 feet, 1 hour = 60 minutes

$\dfrac{5\ miles}{1\ hour}\times \dfrac{5280\ ft}{1\ mile}\times \dfrac{1\ hour}{60\ min}\times 5\ min=\dfrac{132,000}{60}ft=\large\boxed{2,200\ ft}$