Streams of electrically charged particles flowing at high speeds from the sun make up the

A copper wire 12 cm long and a mass of 16 g is in a magnetic field of 1.2 T oriented perpendicular to the wire. What current wou

Ugo [173]

Answer:

Current, I = 1.08 A

Explanation:

Given that,

Length of the copper wire, l = 12 cm = 0.12 m

Mass of the wire, m = 16 g = 0.016 kg

Magnetic field, B = 1.2 T

The magnetic field is oriented perpendicular to the wire. We need to find the current in the wire.

Magnetic force, F = BIL

Force of gravity, F' = mg

F' = F

$BIL=mg$

$I=\dfrac{mg}{BL}$

$I=\dfrac{0.016\times 9.8}{1.2\times 0.12}$

I = 1.08 A

So, the current through the wire is 1.08 A. Hence, this is the required solution.

8 0

4 years ago

Plutonium-239 is a radioactive isotope commonly used as fuel in nuclear reactors. The half-life of plutonium-239 is 24,100 year

r-ruslan [8.4K]

Answer:

72,300 years.

Explanation:

Initial mass of this sample: 504 grams;

Current mass of this sample: 63 grams.

What's the ratio between the current and the initial mass of this sample? In other words, what fraction of the initial sample hasn't yet decayed?

$\displaystyle \frac{\text{Current Mass}}{\text{Initial Mass}} = \rm \frac{63\; g}{504\; g} = \frac{1}{8}$ .

The value of this fraction starts at 1 decreases to 1/2 of its initial value after every half-life. How many times shall 1/2 be multiplied to 1 before reaching 1/8? $2^{3} = 8$ . It takes three half-lives or $3\times 24100 = 72300$ years to reach that value.

In certain questions the denominator of the fraction is large. It might not even be an integer power of 2. The base-x logarithm function on calculators could help. Evaluate

$\displaystyle \log_{\frac{1}{2}}{\frac{1}{8}} = 3$ to find the number of half-lives required. In case the base-x logarithm function isn't available, but the natural logarithm function $\ln()$ is, apply the following expression (derived from the base-changing formula) to get the same result:

$\displaystyle \frac{\displaystyle\ln{\left(\frac{1}{8}\right)}}{\displaystyle \ln{\left(\frac{1}{2}\right)}}$ .

3 0

3 years ago

The city of Istanbul turkey sits on what?

Sati [7]

Istanbul is a transcontinental city in Eurasia, straddling the Bosporus strait (which separates Europe and Asia) between the Sea of Marmara and the Black Sea. Its commercial and historical center lies on the European side and about a third of its population lives in suburbs on the Asian side of the Bosporus.

8 0

4 years ago

Read 2 more answers

Convert $25 in dimes<br><br> (I need explanation as well)

CaHeK987 [17]

Answer: To convert this into dimes it's basically like 25 divided by 10.

25 / 10 = 2.5, So you'd need two dimes and a nickel.

7 0

3 years ago

Describe how you could made a sound wave have a higher pitch.

Anastaziya [24]

<span>the quality of being hot; high temperature.</span>