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lesya [120]
2 years ago
7

Calculate the reading on voltmeter v²​

Physics
2 answers:
Olegator [25]2 years ago
6 0

Answer:

V

1

and V

2

are equal and out of phase with each other and thus get cancelled. Thus V

3

=220V and i=

100

220

=2.2A

Yuliya22 [10]2 years ago
3 0

The reading of the voltmeter can be determined by finding the potential difference across the 2Ω resistance by using the value of current in the circuit. V=IR, here V is the potential difference across a resistance R through which a current I is flowing.

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Which is not a device for reproducing sound? phonograph MP3 player gramophone microphone
m_a_m_a [10]

Answer:

microphone

Explanation:

3 0
4 years ago
A box with mass 25.14 kg is sliding at rest from the top of the slope with height 13.30 m
lutik1710 [3]

Answer:

Explanation:

The first thing we are asked to find is the Force experienced by the box. That is found in the formula:

F - f = ma where F is the force exerted by the box, f is the friction opposing the box, m is the mass, and a is the acceleration (NOT the same as the pull of gravity). But F can be rewritten in terms of the angle of inclination also:

wsin\theta-f=ma where w is the weight of the box. We will use this version of the formula because it will help us answer the second question, which is to solve for a. Filling in:

First we need the weight of the box. Having the mass, we find the weight:

w = mg so

w = 25.14(10) so

w = 251.4 N (I am not paying any attention at all to the sig fig's here, since I noticed no one on this site does!) Now we have the weight. Filling that in:

251.4sin(30) - f = ma Before we go on to fill in for f, let's answer the first question. F = 251.4sin(30) so

F = 125.7   And in order to answer what a is equal to, we find f:

f = μF_n where Fn is the weight of the object.

f = .25(251.4) so

f = 62.85. Filling everything in now altogether to solve for a, the only missing value:

125.7 - 62.85 = 25.14a and

62.85 = 25.14a so

a = 2.5 m/s/s

Now we have to move on to another set of equations to answer the last part. The last part involves the y-dimension. In this dimension, what we know is that

a = -10 m/s/s

v₀ = 0 (it starts from rest)

Δx = -13.30 m (negative because the box falls this fr below the point fro which it started). Putting all that together in the equation for displacement:

Δx = v₀t + \frac{1}{2}at^2 and we are solving for time:

-13.30=0t+\frac{1}{2}(-10)t^2 and

t=\sqrt{\frac{2(-13.30)}{-10} } so

t = 1.6 seconds to reach the bottom of the slope from 13.30 m high.

3 0
3 years ago
5CaO4
RUDIKE [14]

Answer:

a) 2

b) 9

c) 5

d) 14

e) 4

f) 5

Explanation:

6 0
3 years ago
Gbenga needs to get glasses to correct his farsightedness. His eyes currently cannot focus on objects that are within 2 ft (or 6
Scilla [17]

Answer:

Focal Length = 38.61cm, Power = 2.59 Diopter, Converging lens.

Explanation:

When an object is placed 25cm from Gbenga's eye, the glasses lens must produce an image 61cm away (Gbenga's eye near point).

An image 61cm from the eye will be (61cm - 1.6cm) from the glasses.

i.e. d_{i}=61cm-1.6cm=59.4cm

and d_{o} = 25cm - 1.6cm = 23.4cm

note d_{i} will be negative because the image is formed on the same side as the object.

finally, d_{i}=-59.4cm\\d_{o}=23.4cm

the formula for finding the focal length f is given as

f=\frac{d_{i}d_{o}  }{d_{o}+d_{i}  }

f=\frac{-59.4*23.4}{23.4-59.4} \\

f=\frac{-1389.96}{-36}

f=38.61cm

The focal length is positive which indicates converging lens

power p=\frac{1}{f}

but f\\ must be in metres

Therefore, f=38.61cm=0.3861m

p=\frac{1}{0.3861}

p=2.59 Diopter

3 0
4 years ago
A sample of a substance has a high density, yet a low particle motion. This sample must be a
avanturin [10]
The most possible answer is letter B) Liquid. 
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3 0
3 years ago
Read 2 more answers
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