⟩ In radioactive dating we use half life to determine the age of a sample but not average life why?
It is a quantitative measure in which we compare the
quantity of a radioactive substance in the sample to that
in the atmosphere/fresh substance.
It is a quantitative measure in which we compare the
quantity of a radioactive substance in the sample to that
in the atmosphere/fresh substance.
Certain products have been designed so that people wearing headphones do not hear the objectionably loud sound from certain machinery with which they are working. These headphones most likely work based on which one of the following principles
According to Coulombs Law, if two charged particles are repelled with a given force at a distance d, by what multiple will the force decrease by if d is increased by 4 times?
Which of the following is the most accurate reason why a light bulb dropped on a rug does not break, but when dropped on a tile floor it does break
The lowest frequency that determines the pitch of a musical note is most commonly called the
Order the following from the WORST electrical conductor to the BEST electrical conductor glass, rubber, iron, dry wood
A bullet of mass m travelling at velocity v has a kinetic energy of ½mv2 when it strikes a ballistic pendulum of mass 1000 grams. The kinetic energy of the two masses moving together just after the moment of impact is about a thousand times smaller than ½mv2. What has most of the bullets initial kinetic energy been converted to?
In the 19th century, this Scottish scientist showed that all magnetic and all electric phenomena could be described by four equations that often bear his name. What is his name?
When Thomas Edison was promoting the wide use of direct current, this personal enemy of Edisons was the chief proponent and expert in alternating current
When a green colored object is illuminated by a green light it will appear as what color to the human eye?
How many more times louder is 70 decibels than 10 decibels?