Weight gain occurs when a person consumes too muchimany

A skateboarder is standing at the top of a tall ramp waiting to begin a trip. The skateboarder has

erik [133]

Potential energy. When it starts moving, that potential energy will start transforming into kinetic energy.

3 0

3 years ago

2 Resistors of resistance, R = (100 +- 3) Ohm, R2 = (200+-4)Ohm are connected in Parallel and Series.

Orlov [11]

According to what I've learnt, in any expression of multiplication or division, the percentage errors of each term are added up to find the equivalent percentage error. That is, if

y=ABC

y=ABCthen% error in y= % error in A + % error in B + % error in C

For the above problem, let Rs denote series combination. Then Rs=300±7 ohm.

Let Rp denote parallel combination.

∴Rp=R1R2/R1+R2 = R1R2/Rs

Ignoring errors, we get Rp=200/3 = 66.67 ohm

%error in R1=3, %error in R2=2, %error in Rs=7/3

Hence, %error in Rp=3+2+7/3=22/3

So, error in Rp will be 22/3% of 200/3, which is approximately 4.89.

Hence, I got Rp=66.67±4.89 ohm.

However, the book used the formula described and proved here and arrived at the answer Rp=66.67±1.8ohm.

8 0

3 years ago

Read 2 more answers

If the labor force of 155 million people is growing by 1.0 percent per year, how many new jobs have to be created each month to

dybincka [34]

First let us compute for the total growth in population.

Growth = 155 million * 0.01

Growth = 1.55 million

Since there are 12 months in a year, therefore the new jobs every month should be:

new jobs per month = 1.55 million / 12

new jobs per month = 0.129 million = 129,167

8 0

4 years ago

Choose the items that help to fully describe voltage.

Zina [86]

Answer:

the easy way to describe this is to use a light as an example.

Explanation:

Voltage is pretty much the loop used to help use a lightbulb to emit light. Without voltage, we would be unable to use lightbulbs. This applies to much more than a lightbulb, but it's the easiest way to describe how voltage works.

8 0

2 years ago

And electromagnet is in temporary magnet made by Coiling wire around an iron core which becomes a magnet win and electric curren

Bad White [126]

Answer:

We can increase the strength by increasing current in the wire or increasing the number of turns of the coil around an iron core .

Explanation:

The magnetic strength due to current carrying conductor carrying current I and having N number of turns is given by

B = $\mu _{0}\times N\times I$

$\mu_{O}$ is vacuum permeability .and its value is equal to $4\pi\times10^{-7} \frac{H}{m}$

.so from the above equation we can see that magnetic strength is directly proportional to the current through wire and no. of turns .

3 0

3 years ago