Via half-life equation we have:
Where the initial amount is 50 grams, half-life is 4 minutes, and time elapsed is 12 minutes. By plugging those values in we get:
There is 6.25 grams left of Ra-229 after 12 minutes.
The direction in which the magnetic force is acting on the charge is upwards.
<h3>What is Magnetic force?</h3>
This is the attraction and repulsion which usually occurs during the motion of electrically charged particles.
In the magnetic field, the charge is moving to the left. Therefore the direction the magnetic force is acting on the charge is upwards which is gotten via right hand rule.
Read more about Magnetic force here brainly.com/question/25932320
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Its quite hard to give you facts over this but just type into google facts about the sonar/lunar eclipse.
Two ways the Doppler effect can be applied to every day life is...
1. The pitch of an Ambulance Siren shifts as it passes you.
<span>2. A cop's radar gun using radiation waves to find out how fast your going as you confused I-85 with the speed limit</span>
