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Snezhnost [94]
4 years ago
7

Answer for this question please

Physics
2 answers:
Cloud [144]4 years ago
8 0
20 minutes is the half life
Tju [1.3M]4 years ago
6 0
The half life is 20 mins since it takes 20 mins for it to be half of what it was before
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Might it be possible to explain the interaction of the rod and pieces of paper as a gravitational interaction? please explain wh
mina [271]

It is not possible  to explain the interaction of the rod and pieces of paper as a gravitational interaction.

<h3>What is Gravitational interaction?</h3>

This is defined as the interaction between a particle or body resulting from their mass. This type of interaction is usually weak and occurs in all distances possible.

It is not gravitational interaction, because the rod attracts paper only against the gravitational force of the earth and there is no attraction between both bodies under a different condition.

This is therefore the reason why it is not possible to explain the interaction of the rod and pieces of paper as a gravitational interaction.

Read more about Gravitational interaction here brainly.com/question/25624188

#SPJ1

5 0
2 years ago
Which one of the following statements is true?
Vlad1618 [11]
B. Because chemical changes (for example, burning turning something into ashes) can change it's appearance while physical changes (for example, crumpling a piece of paper) can aswell.
3 0
4 years ago
500km is equal to how many millimeters
Sindrei [870]

Answer:

500000000

if you can give me brainliest that would be great

7 0
4 years ago
A moving billiard ball hits another ball at rest, causing the first ball to stop moving as the second rolls away. If the two bal
mario62 [17]
<span>The momentum of the second ball will depend on the acceleration of the first moving ball.</span>
3 0
3 years ago
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A medical ultrasound imaging system sends out a steady stream of very short pulses. To simplify analysis, the reflection of one
arlik [135]

Answer:

Minimum time = 1.95x10^-4 s

Number of pulses = 5128.21 pulses/s

Explanation:

We have the speed of sound waves through human tissue with a value of 1540 m/s, to calculate the time it takes for the pulse to travel a distance of 30 cm (since the pulse will first travel a distance of 15 cm and then it will return another 15 cm to be detected by the equipment), therefore, the time between the two pulses will be equal to:

tminimum = 0.30 m/1540 m/s = 1.95x10^-4 s

To calculate the number of pulses, one second must be divided over the minimum time between the two pulses, as follows:

npulses = 1 s/1.95x10^-4 s = 5128.21 pulses/s

5 0
3 years ago
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