The answer is <span>Polonium-218 (84 protons).
Alpha particles consist of two protons and two neutrons. So, mass is 4 (2+2) amu </span><span>.
</span><span>When an atom of emits an alpha particle, its atomic number will be reduced by 2 and a mass number will be reduced by 4:
</span> → + .<span>
After emission of the alpha particle from Radon-222 with 86 protons, the daughter product will have the atomic number reduced by 2: 86-2 = 84 and the mass number reduced by 4: 222-4=218:
</span> → + .
The question that can be answered using the sense of touch is : ( B ) is the soil grainy
<h3>
Sense of touch</h3>
The graininess of the soil can be felt by the touch of the hands because it is a physical attribute of the soil that can be seen and touched as well. the color of the soil and how quickly water flows through the soil can only be examined with the physical eyes but cannot be felt.
Hence we can conclude that the question that can be answered using the sense of touch is the soil grainy.
Learn more about Graininess of soil : brainly.com/question/25010777
The work done by the shark is 128000 J which is greater than the maximum force the cage can withstand (124500 J), the man in the cage should be worried.
<h3>What is work done?</h3>
Work done is the product of force and the distance covered by the force.
Mathematically;
- Work done = Force × distance
The unit of work done is Joules.
The work done by the shark is calculated as follows:
Work done = 12800 × 10
Work done = 128000 J
Maximum force the can withstand = 124500 J
Since the work done by the shark is greater than the maximum force the cage can withstand, the man in th cage should be worried.
Learn more about work done at: brainly.com/question/25573309
Answer: Contractility of the left ventricle myocardium ensures that blood will have enough force to reach the rest of the body.
Explanation: Frank Starling Law....Cardiac output=heart rate x stroke volume.
Answer:
An earthquake
Explanation:
An earthquake is caused when plates move around and clash.
