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2 years ago

A plane mirror forms a virtual image. give reasons

Physics

2 answers:

ella [17]2 years ago

5 0

Answer:

becaise the light does not actually pass through the image

xenn [34]2 years ago

4 0

Answer:

1. The reason why a plane mirror forms a virtual image is because it doesn't let the light go through it, but it reflects the light, so if you go behind the plane mirror, then you won't see the rays of light since it's not letting the rays of light go behind it.

2. The image cannot be projected onto a screen also.

3. Also, the Rays of light never meet at a focus point, so hence, this is why the plane mirror forms a virtual image.

Thanks!

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4 years ago

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A 9.0-V battery is connected to a resistor so that there is a 0.50-A current through the resistor.For how long should the batter

salantis [7]

Answer:

35.6 s

Explanation:

The power through the resistor is given by:

$P=VI$

where V=9.0 V is the voltage and I=0.50 A is the current. Substituting into the formula, we find

$P=(9.0 V)(0.5 A)=4.5 W$

The power is also equal to:

$P=\frac{W}{t}$

where W is the work done while t is the time taken. Since we know the work done, W=160 J, we can re-arrange the equation to find the time taken:

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4 years ago

oscillating spring mass systems can be used to experimentally determine an unknown mass without using a mass balance. a student

12345 [234]

Answer:

Mass, m = 6.18 kg

Explanation:

Given the following data;

Frequency, F = 10 Hz

Spring constant, k = 250 N/m

We know that pie, π = 22/7

To find the mass, we would use the following formula;

F = 1/2π√(k/m)

Where;

F is the frequency of oscillation.

k is the spring constant.

m is the mass of the spring.

Substituting into the formula, we have;

10 = 1/2 * 22/7 * √250/m

10 = 22/14 * √250/m

Cross-multiplying, we have;

140 = 22 * √250/m

Dividing both sides by 22, we have;

140/22 = √250/m

6.36 = √250/m

Taking the square of both sides, we have;

6.36² = (√250/m)²

40.45 = 250/m

Cross-multiplying, we have;

40.45m = 250

Mass, m = 250/40.45

Mass, m = 6.18 kg

3 0

3 years ago

What is the rms current flowing through a light bulb that uses an average power of 30.0 W when it is plugged into a wall recepta

Amiraneli [1.4K]

Answer:

0.125 A

Explanation:

From the question given above, the following data were obtained:

Power (P) = 30 W

rms voltage (Vrms) = 240 V

rms Current (Irms) =?

The power in an electric circuit is given by the following equation:

Power (P) = current (I) × voltage (V)

With the above formula, we can obtain the rms current flowing through the bulb as shown below:

Power (P) = 30 W

rms voltage (Vrms) = 240 V

rms Current (Irms) =?

P = Irms × Vrms

30 = Irms × 240

Divide both side by 240

Irms = 30 / 240

Irms = 0.125 A

Thus, the rms current flowing through the light bulb is 0.125 A

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3 years ago

A plane mirror forms a virtual image. give reasons ​

A plane mirror forms a virtual image. give reasons