Ask question

Ask question

All categories

kondor19780726 [428]

2 years ago

9

An electric appliance is connected by wires to a 240-volt source of voltage. If the combined resistance of the appliance and wir

es is 12 ohms, how much current is flowing through the circuit?

1 answer:

uranmaximum [27]2 years ago

6 0

Voltage=V=240V
Resistance=R=12ohm
Current be I

Apply ohms law

V=IR
240=12I
I=240/12
I=20A

You might be interested in

A 740-kg boulder is raised from a quarry 119 m deep by a long uniform chain having a mass of 550 kg . This chain is of uniform s

Naddika [18.5K]

Answer:

A) the maximum acceleration the boulder can have and still get out of the quarry

B) how long does it take to be lifted out at maximum acceleration if it started from rest

Explanation:

A)

let +y is upward. look below at the free body diagram. the mass M refers to the combined mass of the boulder and chain.

the weight of the chain is: $w_{c} =m_{c} g$ and maximum tension is $T=2.50 m_{c} g=1.41*10^4N$

total mass and weight is :

$M =m_{c}+ m_{b} =740kg+550kg=1290 kg$

$w_{M} =1.2650*10^4N$

∑ $F_{y} =ma_{y}$

$T-M_{g} =Ma_{y}$

$a_{y} =(t-M_{g} )/M=(2.50m_{c} -M_{g} )/M=(2.50.550kg-1290kg)(9.8m/s^2)/1290kg$

$=0.645m/s^2$

B)

maximum acceleration

$a_{y} =0.645m/s^2\\\\y-y_{0} =119m\\v_{0y} =0$

using $y-y_{0} =v_{oy} t+1/2(a_{y} )t^2$

to solve for t

$t=\sqrt{2(y-y_{0} )/a_{y} }$

$t=\sqrt{2(119m)/0.645m/s^2} =19.20s$

6 0

3 years ago

The seafloor spreading process at ridges produces what kind of faults?

irga5000 [103]

Active transform faults are between two tectonic<span> structures or faults.</span>

4 0

3 years ago

A spaceship far from all other objects uses its impulse power system to attain a speed of 104 m/s. The crew then shuts off the p

asambeis [7]

Answer:

Velocity remains the same at 104 m/s

Explanation:

According to Newton's 1st law of motion, an object subjected to no force or net force equal 0 would maintain its velocity. In our case the crew shuts off the power, spaceship is in space and far from all other objects (so no gravity whatsoever) would have no force acting on it. Therefore its velocity would stay the same at 104 m/s

4 0

3 years ago

True or false is Conservation of monestum is the same as Conservation of energy

fiasKO [112]

Answer:

Conservation of Energy: the total energy of the system is constant. Conservation of Momentum: the mass times the velocity of the center of mass is constant. Conservation of Angular Momentum: The total angular momentum of the system is constant.

Explanation:

none

3 0

3 years ago

The speed of sound in air is 331 m/s. what is the plane's speed in terms of the speed of sound?

Zina [86]

<span>The initial speed, u of plane in terms of velocity of sound which may be taken as U
u=142/331=0.429*U
It crosses the sound barrier after says t seconds then we have 331-142=23.1*t or t is given 8.18 s exactly t=9/11s.
After 18 seconds the plane will traveling with velocity V
V=142+18*23.1=557.8 m/s==1.685*U</span>

5 0

3 years ago