All categories

4 years ago

HELP PLEASE!!!

Physics

1 answer:

Leya [2.2K]4 years ago

3 0

For the first one 320

second

1200W

Data

R = 12 Ω ∆V = 120V I =? P =?

Solution:

According to Ohm’s law,

∆V = I R

I = ∆V / R

= 120 / 12

= 10 A

Power P = I ∆V

= 10 x 120

= 1200 W

Third

∆V = 120 V P = 60 W I =? R =?

Use the formula, P = I ∆V

I = P / ∆V = 60 / 120 = 0.5 A

∆V = I R

R = ∆V / I = 120 / 0.5 = 240 Ω

You might be interested in

What is the frequency of light for which the wavelength is 7.1 × 102 nm?

Brilliant_brown [7]

Answer:

Frequency, $f=4.22\times 10^{14}\ Hz$

Explanation:

Given that,

Wavelength of the light,

$\lambda=7.1\times 10^2\ nm=7.1\times 10^2\times 10^{-9}\ m\\\\\lambda=7.1\times 10^{-7}\ m$

We need to find the frequency of light. We know that light is an electromagnetic wave. It moves with the speed of light. So,

$c=f\lambda$

f is the frequency of light

$f=\dfrac{c}{\lambda}\\\\f=\dfrac{3\times 10^8\ m/s}{7.1\times 10^{-7}\ m}\\\\f=4.22\times 10^{14}\ Hz$

So, the frequency of light is $4.22\times 10^{14}\ Hz$ . Hence, this is the required solution.

5 0

4 years ago

A child on a swing falls a height of 1m. What speed will the child reach?

kirill [66]

Answer: $v=4.42\ m/s$

Explanation:

Given

Child falls a height of $h=1\ m$

Applying conservation of energy we can write

Loss in Potential energy=Gain in kinetic energy

$mgh=\frac{1}{2}mv^2$

$v=\sqrt{2gh}$

$v=\sqrt{2\times 9.8\times 1}$

$v=\sqrt{19.6}$

$v=4.42\ m/s$

Thus child reaches a velocity of 4.42 m/s

7 0

4 years ago

In the experiment, “Rolling Along”, which ball had the greater mass?

olga2289 [7]

Answer:

Explanation:

4 0

3 years ago

How is an arranged marriage different from or similar to other ways people find and experience love today?

Zepler [3.9K]

Answer:

The arrange marriage and love marriage is same or different from each other "one is about loving and then getting committed and another one is getting committed and then loving,so in the either way both are same."

Explanation:

There is no difference at all! Because eventually, in both the cases, people manage to stay together and share the responsibilities. What actually matters is that, if Love happened.

Let’s put it this way. Two people fell in love and they get married, but why is that the same couple would want to separate later? Let’s take another example. Two people who don’t have any idea of each other’s existence get married. why is that they choose to live together forever? Love becomes the reason for any split or patch.

When two people are in love everything becomes easy. A relationship doesn’t look hard, in fact I have friends who have a wonderful married life and people still don’t bother to find if that’s a love or an arranged match. Few of them choose partners of their own and few of them fell head over heels in love with their spouse, but all of them look as if they are on an extended holiday.

8 0

3 years ago

State three precautions taken when using a metre rule

marishachu [46]

Answer:

1. Our eye should be vertically abvove the point, where the measurement is to be taken.

2. For proper measurement, Keep the ruler exactly along the length , for the measurement

Explanation:

good luck

5 0

3 years ago