Answer:
Plate tectonics is the name for the process that forms Earth's features. Plates spread apart, bump together, slide under one another, or slide past each other. Forces on the surface also change the land. The movement of wind and water breaks rock down, and erosion wears Earth's surface away.
Answer:
D) the steady, clocklike decay of certain radioactive isotopes over time.
Explanation:
Geologists use radiometric dating to estimate how long ago rocks formed, and to infer the ages of fossils contained within those rocks.
For example, when rocks are formed, such as igneous rocks (formed when molten rocks cools), certain radioactive atoms are trapped inside the rocks during this formation process. Then these radioactive atoms decay over time.
The age of the rock can be estimated by comparing the occurring radioactive isotope within the material to the abundance of its decay products, which form at a known constant rate of decay.
From the options;
A) this is about the formation of the radioactive molecules and not about radiometric dating
B) this is radiocarbon dating (cabon dating/carbon-14 dating)
C) the <em>assumption </em>is wrong since the radioactive isotopes decays not accumulate.
D) the corect option as I explained earlier.
Answer:
Tangent of a = 12/5
Explanation:
Tangent is opposite/adjacent
4 men x 8 days = 32 days work content & 6 women x 8 days = 48 work content
6 women at 1/400 per day x 8 days is 48/400. 352+ so 1 mans daily output is 11 work units per day x 4 men = 44 work output per day x 8 days = 352 total work output
3 men x 10 days = 30 days work content & 7 women x 10 days = 70 work content
1 man work output is 11 x 3 men x 10 days = 333 work units
one woman’s work output is 1/400 per day x 7 women = 7/400 per day x 10 days = Total of 70 work output plus men’s output of 330 = 400 work units.
10 women x 40 days = 400 work content
so if 10 men carried out the work its 11 x 10 men = 110 work units per day
400 work units + 110 work units per day = 3.6363 days work for 10 men.
1 women daily work output = 1/400 unit per person x 10 women or 10/400 work units per day so 10 x 40 days
4 Men & 6 Women = 8 days (men = 4 x 8 x 11 = 352)( 6 x 8 x 1/40 = 48/40
3 Men & 7 Women=10 days (men = 3 x 10 x 11 = 330)(7 x 10 x 1/40 =70/40)
10 women at 1/400 each per day x 40 days is 400 work units
while 10 men x 11 units is 110 units per day so for 400 units it’s 3.6363 days
1 man is equal approximately to 11 Women
10 men can do job in 3.6363 days x ratio of 11 =
Answer: It will taken 10 women x 40 days to complete the same job.