Ownership, size, teaching status
Answer: Guateque Campesino
Explanation: Every culture in this world has some particular events and modes of celebrations. People of Cuba in general and Cuban people living at countryside in particular celebrates this event together with friends and family mainly to celebrate the end of the harvest. Multiple music instruments are used to compose their specific music genre for this celebration.
Answer:
B and C
Explanation:
B. In a given rock sample, the amount of Silicon-32 isotopes gets divided in half about every 170yrs.
This is the concept of half-life. Half life is the time take for half of a radioactive isotope to disintegrate. The shorter the half life the faster the isotope disintegrates.
From the question, we were told that it would take 170yrs for half of the isotope of Silicon to disintegrate to Phosphorus. This is the half life.
C. The half life can be used to determine the amount of Si-32 that has decayed from the time closure temperature was reached.
The closure temperature is very important in radioactivity. It is the temperature at which a system has cooled and there is no resulting disintegration of parent and daughter isotopes.
From first order kinetics, we know that the rate at which radioactive elements decay at any time is directly proportional to the number of radioactive atoms present. A knowledge of the half life helps to figure out the number of atoms that has decayed in time.
The Yangtze River is the longest river in Asia 6 301 km
I think it is D if i remember middle school that well
