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4 years ago

Difference between d.c and a.c

1 answer:

5 0

Answer: In direct current (DC), the electric charge only flows in one direction.
Electric charge in alternating current (AC<span>), changes direction periodically.

Hope this helps! :)</span>

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A thermometer is placed in water in order to measure the water's temperature period what would cause the liquid in the thermomet

Naddik [55]

The thermal energy of the water. Because the water is waaay above Absolute Zero (0K, or -273,15 C) it holds thermal energy or aka the temperature of the water. If the temperature of the water is higher than the one in the thermometer, the heat will 'flow' into the liquid (mostly mercury or modern, it is ethanol), causing the liquid to rise since it's volume increases. The same when te water has lower temperature. The thermal energy of the thermometer will 'flow' in the water and the volume shrinks, causing the liquid to go down. Simple thermodynamics.

7 0

3 years ago

Force F = − + ( 8.00 N i 6.00 N j ) ( ) acts on a particle with position vector r = + (3.00 m i 4.00 m j ) ( ) .

jek_recluse [69]

Explanation:

Given that,

Force, $F=((-8i)+6j)\ N$

Position of the particle, $r=(3i+4j)\ m$

(a) The toque on a particle about the origin is given by :

$\tau=F\times r$

$\tau=((-8i)+6j) \times (3i+4j)$

Taking the cross product of above two vectors, we get the value of torque as :

$\tau=(0+0-50k)\ N-m$

(b) Let $\theta$ is the angle between r and F. The angle between two vectors is given by :

$cos\theta=\dfrac{r.F}{|r|.|F|}$

$cos\theta=\dfrac{(3i+4j).((-8i)+6j)}{(\sqrt{3^2+4^2} ).(\sqrt{8^2+6^2}) }$

$cos\theta=\dfrac{0}{50}$

$\theta=90^{\circ}$

6 0

3 years ago

Do you think objects will be able to move without action and reaction forces?

iren2701 [21]

No i don’t think so

8 0

4 years ago

Describe the agronomic significance of the upper and lower plastic limits, and of the plasticity index?

GarryVolchara [31]

Answer:It shows the size of the range of the moisture contents at which the soil remains plastic. In general, the plasticity index depends only on the amount of clay present. It indicates the fineness of the soil and its capacity to change shape without altering its volume.

4 0

3 years ago

Does frequency affect wavelength?

Vinil7 [7]

Answer:

yeah

Explanation:

as wavelength increases frequency decreases and it goes the same for the opposite way

6 0

3 years ago