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4 years ago

How does newton's first law affect human motion?

Physics

1 answer:

melomori [17]4 years ago

6 0

His lawn defies gravity alone with the way human body works

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A seismograph located 1200 km from an earthquake detects seismic waves 5 minutes after the quake occurs. The seismograph oscilla

shepuryov [24]

To solve this problem we will apply the given relationship between wavelength, speed and frequency as well as the use of kinematic equations of motion description.

The wavelength is directly proportional to the speed and inversely proportional to the frequency, in other words,

$\lambda = \frac{v}{f}$

Where

v = Velocity

f = Frequency

Speed is not given but if the distance traveled in a certain time, that is

$v = \frac{d}{t}$

Replacing

$v = \frac{1200km}{5min}$

$v = \frac{240km}{min}(\frac{1min}{60s})(\frac{1000m}{1km})$

$v = 4000m/s$

Substituting this value at our first equation we have

$\lambda = \frac{v}{f}$

$\lambda = \frac{4000}{2}$

$\lambda = 2000m$

Therefore the wavelength of the seismic wave is 2000m

6 0

4 years ago

A torque acts on a wheel rotating at 19.8 rad/s and increases its angular speed to 23.5 rad/s in 11.2 s. Find the angle through

faltersainse [42]

243 rad is the angle through which the wheel turns during this time.

<h3>What is torque and angular speed?</h3>

Torque is a measure of the force that can cause an object to rotate about an axis.

Angular speed is define as the measuring angle of rotation over a given amount of time.

Mathematically , ω = θ t

From the given question ,

Torque = 19.8 rad/s

ω = 23.5 rad/s

t = 11.2 s

We get the equation,

$\frac{ 19.8 +23.5}{2} * 11.2$

= 243 rad

Learn more about Angular momentum here:

brainly.com/question/15104254

#SPJ1

7 0

2 years ago

What can the vacuole hold? (check all that apply) <br> A) water<br> B) waste<br> C) nutrients (food)

Verizon [17]

Answer:

C & A 100000%

Explanation:

i took this test before and i just made sure on safari . Its food (nutrients) and water

7 0

3 years ago

The tub of a washing machine goes into its spin cycle, starting from rest and gaining angular speed steadily for 10.0 s, at whic

ioda

Answer:

69 revolutions

Explanation:

given,

initial angular velocity = 0

final angular velocity = 6 rev/s

when safety switch turned off

tub smoothly slows to rest in (t)= 13 s

total revolution of tub = ?

angular acceleration = $\dfrac{\omega_f-\omega_0}{t}$

angular acceleration = $\dfrac{6-0}{10}$

= 0.6 rev/s²

now,

$\theta = \omega_i t +\dfrac{1}{2}\alpha t^2$

$\theta = 0+\dfrac{1}{2}\times 0.6 \times 10^2$

= 30 revolution

now,

when safety switch turn off

angular acceleration = $\dfrac{\omega_f-\omega_0}{t}$

angular acceleration = $\dfrac{0-6}{13}$

= -0.462 rev/s²

now,

$\theta = \omega_i t +\dfrac{1}{2}\alpha t^2$

$\theta = 6 \times 13 -\dfrac{1}{2}\times 0.462 \times 13^2$

= 39 revolution

total revolution = 30 + 39 = 69 revolutions.

tub will rotate 69 revolutions

4 0

3 years ago

4. What is the efficiency of a pulley that does 571 J of work if the input work is 1,694 J?

kvasek [131]

Explanation:

Efficiency = work out / work in

e = 571 J / 1694 J

e = 0.337

8 0

4 years ago