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wolverine [178]
3 years ago
7

A ruler vibrates 70 times in 20 seconds.what is the frequency of its vibration

Physics
1 answer:
Bad White [126]3 years ago
8 0

Answer:

we know that that frequency= n/t

= 70/20

= 3.5 Hertz

Explanation:

i think that the answer

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The grounded conductor and the grounding conductor are one and the same conductor and perform the same function.
STALIN [3.7K]

Answer:

Grounded  used to carry the current in the normal conditions. while on the other side grounding is refer to that safety wire that is connected to the earth and currently does not transmit through it.

As grounding wire is referred to as safety wire hence it carries current only in an emergency like a short circuit.

Explanation:

A grounded conductor is referred to as one of the wire that needed in an electric circuit. it is basically a neutral conductor.  It used to carry the current in the normal conditions. while on the other side grounding is refer to that safety wire that is connected to the earth and currently does not transmit through it.

As grounding wire is referred to as safety wire hence it carries current only in an emergency like a short circuit.

5 0
3 years ago
A sailboat weighing 980 lb with its occupants is running downwind at 8 mi/h when its spinnaker is raised to increase its speed.
Effectus [21]

Answer:

78.498N

Explanation:

The Net force provided by the spinnaker can be obtained from Newton's second law of motion as follows;

F=\frac{m(v-u)}{t}................(1)

where m is the mass, v is the final velocity, u is the initial velocity and t is the time interval for which the force acted.

Given;

m =980lb

v = 12mi/h

u =8mi/hr

t = 10s.

It is important to convert all quantities to their SI units where necessary, so we do that as follows;

1lb = 0.45kg,

hence 980lb = 980 x 0.45kg = 441kg.

1mile = 1609.34m

1hour = 3600s,

therefore;

8mi/h=\frac{8*1609.34m}{3600s}=3.58m/s

12mi/h=\frac{12*1609.34m}{3600s}=5.36m/s

Substituting all values into equation (1), we obtain the following;

F=\frac{441(5.36-3.58)}{10}\\F=\frac{441*1.78}{10}\\F=\frac{784.98}{10}\\F=78.498N

4 0
3 years ago
Which is the property of mattter in which substance can transfer heat to electricity
vodomira [7]

<u>Conductivity</u> is the property of matter in which a substance can transfer heat or electricity.

<h3><u>Additional</u><u> </u><u>information:-</u><u> </u></h3>

Matter : Anything which occupies space and has mass is called matter.

<u>Chemical classifications</u>

  • Pure Substances ( made of one kind of substance )

  • Impure Substances ( mixture )

<u>Physical</u><u> </u><u>classifications</u><u> </u>

  • Solid

  • Liquid

  • Gas

  • Plasma ( made of ions and free electrons )

  • BEC ( Bose Einstein Condensate )

  • Fermionic Condensate ( It discovered in 2003 )
6 0
3 years ago
A scientific _______ is a principle that describes the behavior of a natural phenomenon. A. Model. B. law. C. theory d. Analysis
Jet001 [13]
A scientific law is a principle that describes the behavior of a natural phenomenon. 

Example:  Newton's Laws of Motion
3 0
3 years ago
Read 2 more answers
Five different students in Mr. Garcia's class have done an experiment once, and each one got similar results. What should the st
trapecia [35]

Repeat the experiment

Explanation:

To increase the validity of the results obtained from the single experiment, the students should be encouraged to repeat the experiments more number of times as much as possible.

In an experiment, scientist always try to limit errors by making precise and accurate observation.  A single observation does not really represent a precise and accurate finding. When an experiment is repeated as often as possible, the reliability of the conclusion drawn from the hypothesis testing will improve and the results can be accepted to be valid.

A single observation/experiment is not valid enough.

Learn more:

Experiments brainly.com/question/5096428

#learnwithBrainly

7 0
3 years ago
Read 2 more answers
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