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3 years ago

Many people believe that a vacuum created inside a

Physics

1 answer:

pashok25 [27]3 years ago

3 0

Answer:Due to the pressure difference created by rotating fans.

Explanation:

In most of the vacuum cleaners, there is an area which is of disc shape and it is in right next to the motor. There are several fans within the disc that spin at a very high velocity.

The blades will push the air outside of the disk.There is no air in inside of the disc and air pressure creates which pushes air inside the disk to replace the missing air.

So motor is pushing the air outside and to maintain this pressure the air is pushing toward inside with dirt.

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A student whirls a rubber stopper attached to a string in a horizontal circle above her head. If the radius of the stopper in ci

algol13

Answer:

$v = 12.57 m/s$

Explanation:

As we know that the radius of the circular motion is given as

$R = 50.00 cm$

time period of the motion is given as

$T = 0.2500 s$

now we know that it is moving with uniform speed

so it is given as

$v = \frac{2\pi R}{T}$

now plug in all data

$v = \frac{2\pi(0.50)}{0.25}$

$v = 12.57 m/s$

7 0

3 years ago

The mass of an ice cube in a dish is 3 grams. What is the mass of the melted ice cube in the same dish mast likely to be

aleksklad [387]

I would think it would be the same if you are weighting the dish and the Ice cube at the same time anyway. Not to sure though I'm a beginner and math is complicated for me sometimes.

4 0

4 years ago

f a metal ball suspended by a rod is at rest, which force is responsible for balancing the force due to gravity?

Tamiku [17]

Tension in the rod is responsible for balancing force due to gravity.

6 0

3 years ago

Calculate the speed of an 8.0*10^4kg airliner with a kinetic energy of 1.1*10^9J.

Burka [1]

Answer:

The velocity will be v = 165.83[m/s]

Explanation:

This is a problem where the definition of kinetic energy can be applied, which can be determined with the following equation.

$E_{k}=\frac{1}{2}*m*v^{2}\\ where:\\m = mass = 80000[kg]\\v = velocity [m/s]\\E_{k}= kinetic energy [J]=1100000000[J]\\Replacing:\\v=\sqrt{\frac{2*E_{k} }{m} } \\v=\sqrt{\frac{2*1100000000 }{80000} }\\v=165.83[m/s]$

8 0

3 years ago

The energy required to start a reaction is called the activation energy. true false

Gemiola [76]

The energy required to start a reaction IS called the activation energy. TRUE

3 0

3 years ago