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Anestetic [448]
3 years ago
7

One person holds a spring scale while another pulls until the scale reads 32 N. What is the force that the person holding the

Physics
1 answer:
Mila [183]3 years ago
5 0

Answer:

32 N

Explanation:

There are many students who can not get answers step by step and on time

So there are a wats up group where you can get help step by step and well explained by the trusted experts.

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What is the tangential velocity at the edge of a disk of radius 10cm when it spins with a frequency of 10Hz? Give your answer wi
Nina [5.8K]

Answer:

630cm/s

Explanation:

In simple harmonic motion, the tangential velocity is expressed mathematically as v = ὦr

ὦ is the angular velocity = 2πf

r is the radius of the disk

f is the frequency

Given the radius of disk = 10cm

frequency = 10Hz

v = 2πfr

v = 2π×10×10

v = 200π

v = 628.32 cm/s

The tangential velocity = 630cm/s ( to 2 significant figures)

8 0
3 years ago
Blood flow rates in the umbilical cord can be found by measuring the Doppler shift of the ultrasound signal reflected by the red
lesya692 [45]

Answer:

fR = f(c + v)/c

Explanation:

The speed of a wave is its frequency x wavelenght. Therefore,

Frequency is speed of wave over the wavelength.

Since the source (ultrasound machine) is stationary, and the receiver red blood cell is moving towards it. The wavelenght of the wave sent out towards the observer is c/f

The speed of the reflected sound wave is (c + v), so that the reflected frequency fR is given by

fR = f(c + v)/c

5 0
3 years ago
Obi Wan hears the destruction of a planet and all of its people through 'the force'. These sounds are only in his head and are n
lawyer [7]

Medium, space is empty , sound needs some type of material to travel through.

4 0
4 years ago
Read 2 more answers
On what principle does a bottle opener work
Genrish500 [490]

Answer:

Bottle opener works on a fulcrum.

Explanation:

A bottle opener is a second-class lever because the pivot point is at one end of the opener and the load is in the middle.

4 0
3 years ago
When you jump, you push down on the earth and it pushes back up against you. The earth pushing up against you is what causes you
MissTica

That's a great question !

The answer is:<em> It does !</em>

A push on an object causes the object to <u><em>accelerate</em></u> in the direction of the force.  

The <em>less</em> mass the object has, the <em>more</em> the force accelerates it.

Now, when you jump, the forces on you and on the Earth are equal forces.

The up force on you causes you to accelerate up by some amount.

The down force on the Earth causes the Earth to accelerate down by some amount.

The Earth's mass is something like 5,972,000,000,000,000,000,000,000 kg, while your mass is something like 50 kg.

The Earth has something like 119,400,000,000,000,000,000,000 <em>times</em> as much mass as you have.

So your acceleration is something like 119,400,000,000,000,000,000,000 <em>times as great as the Earth's acceleration.</em>

==> The Earth's downward acceleration, caused by your jump, is there.  It's just too small to notice.

<em>BUT . . .</em> That's the reason why seismometers (instruments to detect and measure the vibrations from distant earthquakes) have to be located as far as possible from cities and busy roads.

In places that are too close to cities and roads, the Earth's surface is always vibrating, wiggling, jiggling, heaving and weaving, in reaction to the forces of people walking around, cars and trucks driving around, even rain falling down.  And kids jumping up and down !  

In such places, these people-motions are louder and stronger than the vibrations coming from distant earthquakes.  Seismometers wouldn't work there.    

5 0
3 years ago
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