What is the magnitude of the force excepted by the mass on the spring scale?

A step up transformer has 250 turns on its primary and 500 turns on it secondary. When the primary is connected to a 200 V and t

Zina [86]

Answer:

2000 W

Explanation:

First of all, we need to find the output voltage in the transformer, by using the transformer equation:

$\frac{V_1}{N_1}=\frac{V_2}{N_2}$

where here we have

V1 = 200 V is the voltage in the primary coil

V2 is the voltage in the secondary coil

N1 = 250 is the number of turns in the primary coil

N2 = 500 is the number of turns in the secondary coil

Solving for V2,

$V_2 = N_2 \frac{V_1}{N_1}=(500) \frac{200 V}{250}=400 V$

Now we can find the power output, which is given by

P = VI

where

V = 400 V is the output voltage

I = 5 A is the output current

Substituting,

P = (400 V)(5 A) = 2,000 W

3 0

4 years ago

Under what condition will the enthalpy change of a process equal the amount of heat transferred into or out of the system?

olga55 [171]

Answer:

At constant pressure

Explanation:

Enthalpy of a system may be defined as the system's internal energy in addition to the product of the volume and pressure of the system.

It can be regarded as the system's capacity of heat transfer and to do non- mechanical work.

The enthalpy of the system at constant pressure gives the amount of heat or energy that is either absorbed by the system or released by the system.

3 0

3 years ago

Nicolo` works on weekends at a Slow Food Parlor. He fills a pitcher full of Cola, places it on the counter top and gives the 2.6

Slav-nsk [51]

Answer:4.22 J

Explanation:

Given

mass of pitcher $m=2.6\ kg$

Force applied $F=8.8\ N$

distance moved $s=48\ cm$

Applying work-Energy theorem which states that work done by all the forces is equal to the change in kinetic energy of the object

Work done by force $W=F\cdot s$

W= $8.8\times 0.48 J$

change in kinetic Energy = $\frac{1}{2}mv^2-0$

$8.8\times 0.48=\Delta K.E.$

K.E.-0= $4.22$

K.E.= $4.22\ J$

8 0

4 years ago

A solar cell that transforms 300 J of light energy into 45 J of electrical energy and 255 J of wasted energy. whats the efficien

Setler [38]

Answer:

15%

Explanation:

Step one:

Given data

Energy source= 300J

Useful energy = 45J

Waste energy = 255J

Required

The efficiency of the solar system

Step two:

The efficiency is computed by factoring only the useful work and the energy source

Efficiency= 45/300*100

Efficiency= 0.15*100

Efficiency= 15%

3 0

3 years ago

The rock cycle is driven by internally by heat from

rusak2 [61]

Hi, earth and the sun would be your answer.

4 0

3 years ago

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