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d1i1m1o1n [39]
3 years ago
13

What does the principle of conservation of matter say

Physics
1 answer:
Vikentia [17]3 years ago
8 0

Answer:

it says that matter cannot be created or destroyed so the number of atoms is the same after chemical reactions

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a 1 gram spiders sits on a platform rotating at 78 rpm. the spider is 15 cm from the centre disk. find the speed of the spider
olga nikolaevna [1]

The spider is traveling in a circle with radius = 15cm

The circumference of any circle = <em>2 pi (radius)</em>
The circumference of the spider's path = 2 pi (15 cm) = 30 pi cm

The spider completes a trip around this path 78 times per minute.
Its speed, relative to you, is   

                               (78) x (30 pi) cm/min =

                                       2,340 pi cm/min =  7,351.33 cm/min =

                                     <em>  73.5133 meter/min =</em>

                                       <em>4.411 km/hr =</em>

                                         <em>2.74  miles/hour

</em>
(After the last appearance of pi,
all numbers are rounded.)<em>

</em>
8 0
3 years ago
An electric motor has an effective resistance of 29. 4 ω and an inductive reactance of 42. 6 ω. When working under load. the rms
Readme [11.4K]

An electric motor has an effective resistance of 29. 4 ω and an inductive reactance of 42. 6 ω. When working under load. the rms voltage across the alternating source is 442 v.  The rms current will be  8.54 A

AC stands for “Alternating Current,” meaning voltage or current that changes polarity or direction, respectively, over time. AC electromechanical generators, known as alternators, are of simpler construction than DC electromechanical generators.

RMS or root mean square current/voltage of the alternating current/voltage represents the D.C current/voltage that dissipates the same amount of power as the average power dissipated by the alternating current/voltage. For sinusoidal oscillations, the RMS value equals peak value divided by the square root of 2.

I (RMS) = RMS voltage / \sqrt{R^{2}+ X_{L} { ^{2}  }

           =  442 / \sqrt{29.4^{2} + 42.6^{2}  }

           = 442 / \sqrt{864.36 + 1814.76}

           = 442 / \sqrt{2679.12}

           = 8.54 A

To learn more about Alternating Current here

brainly.com/question/11673552

#SPJ4

6 0
1 year ago
An object has a force of 10 newtons from the right and 17 newtons from the left. Once the object starts moving toward the right,
Debora [2.8K]
The object will come to a halt.

Resultant force at start:17-10=7 to the left
When additional force is added to the right,it balances the forces acting in the object.

7N to the right and 7N to the left suggests that the object will come to a halt as it is in equilibrium.
5 0
3 years ago
Read 2 more answers
What do electricians call disconnects or disconnecting?
muminat
Service disconnect
this is the first disconnect device after the utility meter.
4 0
2 years ago
which statement about waves is false? a. waves transfer matter b. waves can change direction c. waves can interact with each oth
satela [25.4K]

A.

Waves can transfer energy but they can’t transfer matter

8 0
4 years ago
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