Answer: A
Xenon 138
Explanation:
In the attached nuclear reaction, the sum of the mass number in LHS is
239 + 1 = 240
While the Atomic number = 54 + 0 = 54
The sum of the mass number in the RHS is 100 + 2(1) = 102
While the sum of the atomic number is
40 + 0 = 40
The mass number of the missing element is
240 - 102 = 138
While the Atomic number of the missing element is
94 - 40 = 54
Nuclear reaction at equilibrium, the mass number and the atomic number at LHS must be equal to RHS
The missing element is Xenon 138 with atomic number of 54
Therefore, when the Plutonium is bombarded with a neutron, the result of the reaction is the production of Zirconium 100 and Xenon 138 with the bombardment of two neutrons
Relaxing in a comfortable seat, reading a book and listening to
some mp3 stored on your pod or your pad, your eyes are getting
heavy, you adjust yourself slightly in the seat, getting slightly more
comfortable, your eyes get so heavy that you can't hold them open,
and you doze off.
Your seat is #24-B in a passenger jet in straight and level flight,
cruising in calm air 35,000 feet above the ground, taking you to
visit your grandmother on the coast, at 500 miles per hour.
Answer:
C. has no effect on validity
Explanation:
Repeating your experiment has no effect on validity.
It doesn't matter how many times you repeat your experiment. You have to find the average outcome of each experiment you do.
Answer:
C) Aerobic Fitness
Explanation:
High blood pressure doesn't affect your aerobic fitness.
Answer:
The correct answers would be option A, C and E.
Explanation:
A material made up of synthetic or semi synthetic compounds is called Plastic. This material is malleable and can be molded into solid form. There are many disadvantages of using the plastics. Three of the main disadvantages are :
- Plastic pollutes the land and water. Because it does not decay.
- Plastic takes an incredibly long time to break down.
- Plastic is not easy to recycle.
Above mentioned problems make the use of plastic so undesirable.
