All categories

4 years ago

Which scientist’s notebooks are still too radioactive to handle?

Physics

1 answer:

andrezito [222]4 years ago

3 0

<h2>Answer: Marie Curie's notebooks</h2>

Explanation:

Marie Curie's notebooks, as well as all of her belongings, including her clothes, were contaminated with ionizing radiation. In fact, also those of her husband, because <u>this couple of scientists discovered the radioactivity of several elements</u>, helping the advance of science, but did not know about the consequences of dealing with these materials without adequate protection.

It should be noted that Curie's notes are stored in the basements of the National Library of France, stored in thick lead boxes and those who wish to access these documents must follow the appropriate protocol to treat radioactive material, wear appropriate clothing and sign a responsibility agreement before allowing them to review the documents.

You might be interested in

Distance Using Hubble's Law II.Find the percent difference (% = |A-O|/A × 100) between the actual (A) distance values and calcul

wlad13 [49]

Answer:

Explanation:

Let us first calculate for Virgo

$A= d_{virgo} = 17;M_{pc}, V_{virgo} = 1200 km/s,
$

Using Hubble's law

$v = H_{0}D$ For Virgo

$V_{virgo} = H_{0}D_{virgo}$

$O = D_{virgo} = \frac{v_{virgo}}{H_{0}} = \frac{1200 km/s}{70 km/s/Mpc}= 17.143 Mpc
$

Percentage difference for the Virgo

$\% = \frac{|A-O|}{A}\times 100 = \frac{|17 Mpc-17.143 Mpc|}{17 Mpc}\times 100 = 0.84 \%
$

Now for calculate for Corona Borealis

$A= d_{Corona Borealis} = 310 Mpc, v_{Corona Borealis} = 22000 km/s,
$

Using Hubble's law

$v = H_{0}D$ For Corona Borealis

$v_{Corona Borealis } = H_{0}D_{Corona Borealis }
\\O = D_{Corona Borealis } = \frac{v_{Corona Borealis }}{H_{0}} = \frac{22000 km/s}{70 km/s/Mpc}= 314.286 Mpc
$

Percentage difference for the Virgo

$\% = \frac{|A-O|}{A}\times 100 = \frac{|310 Mpc-314.286 Mpc|}{310 Mpc}\times 100 = 1.3825 \%
$

So clearly Hubble's law is more accurate for the closer objects

3 0

4 years ago

Wich subatomic particles will you add or remove to change the mass of an atom? A)electrons and protons B)protons or neutrons C)e

jolli1 [7]

Technically all subatomic particles have a mass, however, electrons have such a small mass, they are insignificant and generally ignored. On the other hand, the mass of a proton and neutron are substantial, so B would be the correct answer.

6 0

3 years ago

Sally walks 10 meters forward and then 5 meters backwards. Which statement most accurate describes the magnitude of her displace

barxatty [35]

Sally's displacement (5m forward) is 10m less than her distance traveled (15m). <em>(B)</em>

6 0

4 years ago

Read 2 more answers

(will mark brainliest)Which of the following has the most potential energy?

Anastasy [175]

A car speeding down a 20 foot hill

7 0

4 years ago

Read 2 more answers

A 100g mass is swung around a tube 50 times in 1 minute. A. Calculate the angular velocity of the 100 g mass.

sergey [27]

The angular velocity is defined as "the angle changing over time."

From the given of the problem:

m = 100g
rate of revolution = 50 rev / min

Therefore, using the formula:

angular velocity = rate of revolution x 2*pi / revolution

Substituting:

angular velocity = (50 revs / min) x ( 2*pi radians / rev ) = 100*pi radians / min

As you can see, mass is not a part of the equation for solving the angular velocity therefore the amount of mass does not affect its value.

8 0

3 years ago