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1 year ago

Why are household wall sockets alternating current (AC) instead of direct current (DC)? Select all that apply.

Physics

1 answer:

Bond [772]1 year ago

8 0

Answer:

It is easier to scale the voltage of AC from high to low and low to high than with DC

Explanation:

typically power is used far away from the place where it's generated so to ensure that transmission losses( copper losses) are minimized voltage has to be stepped up during transmission..but due to the fact that most house hold equipment requires low voltage levels it has to be stepped down once it reaches a household/ domestic load...it's easier to do this for Ac than for DC.

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A smith needs to melt 0.0500 kg of gold at 21.0°C. How much heat must be added? (Remember, she has to heat it to the melting poi

baherus [9]

Answer:

9704.6 J

Explanation:

Total Thermal Energy

= Energy required to bring gold to melting point + Energy required to change the state of gold from solid to liquid

= mcT + mlf [bolded is energy used to bring gold to melting point, italicised is state change of gold from sold to liquid]

= (0.0500)(126)(1063 - 21) + (0.0500)(6.28 × 10^4)

= 9704.6 J

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3 years ago

What effects does the conductor have on the potential field?

liraira [26]

Type of conductors determines rate of flow of current

8 0

2 years ago

________ is a force acting through distance.

Andreas93 [3]

High school???
No way
It's work.

8 0

2 years ago

an object weighting 100g is thrown upwards from the ground at a speed of 100 m/s.where will the potential energy of the object b

Kay [80]

Answer:

333.3 m

Explanation:

Given

$m =100g\ =\ 0.1kg\\v = 100 m/s\\g = 10 m/s ^2$

Potential energy = $\frac{2}{3}\ of\ Kinetic\ energy$ ......Equation(1)

We know that

Potential energy=mgh

Kinetic energy = $\frac{1}{2} mv^{2}$

Now From the Equation(1)

$mgh=\frac{2}{3}*\frac{1}{2} mv^{2}\\ gh=\frac{v^{2} }{3} \\10 * h=\ \frac{10000}{3}\\ h=\ \frac{1000}{3} \\h=333.3\ m$

3 0

2 years ago

A vehicle with a manual transaxle can be cranked and started without depressing the clutch pedal. Technician A says the clutch i

SashulF [63]

Answer: Technician B

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3 years ago