Can somebody please explain how a compass can be used to find North?

1 answer:

5 0

if the pointy thingy in your compass is pointing north, that means it's being (pulled toward) something near Earth's north pole

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The square plates of a 3000-pF parallel-plate capacitor measure 40 mm by 40 mm and are separated by a dielectric that is 0.29 mm

Travka [436]

Answer:

The square plates of a 3000-pF parallel-plate capacitor measure 40 mm by 40 mm and are separated by a dielectric that is 0.29 mm thick and completely fills teh region between the plates.

Explanation:

5 0

3 years ago

A remote-controlled car runs on a 9V battery. If a 1.5A current is running through the circuit, what resistance is the car prov

Aleonysh [2.5K]

Ohm's law:

V = I * R, so R = V/I = 9/1.5 = 6 Ohm

4 0

3 years ago

If you know that the universe is estimated to be 14 billion years old . what is the age of the universe in seconds ???? (knowing

Svetlanka [38]

Answer:

<em>The estimated age of the universe is</em> $4.42*10^{17}\ seconds$

Explanation:

<u>Time Units Conversion</u>

Sometimes we need to express magnitudes in different units, depending on the specific situation handled in the question or problem at hand. Magnitudes like length, time, mass, temperature, pressure, etc., can be expressed in several different units.

The most common units for time are years, months, days, hours, minutes, and seconds. There are 3,600 seconds in one hour and 24 hours in one day.

We are given the estimated age of the universe as 14 billion solar years. If one solar year is 365.25 days long, then the age, expressed in days is

14,000,000,000 * 365.25 days

Some quantities need to be expressed in scientific notation. This is the case since the numbers are too high

$14,000,000,000 * 365.25 = 5.1135*10^{12}\ days$