Answer:
True
Explanation:
Magma is known as melted rock deep within the Earth, normally coming from the melting of the upper mantle or crust. Magma is formed by the partial melting of the mantle and crust and this can occur in different ways. One way can be called heat-transfer melting. Rising magma or rock will bring heat with it, and so can melt the surrounding mantle or crustal rock. For example, magmas generated in the mantle tend to be around 1200 degrees Celsius, whereas the more silicate minerals such as quartz and orthoclase feldspar (common in continental crustal rocks) begin to partially melt at around 650-850 degrees Celsius. Therefore, the crustal rock will begin to partially melt due to the introduction of heat from rising magma. A Another way of melting rock is known as decompression melting. During decompression melting, rock from within the mantle is brought to the surface adiabatically (no exchange of heat or energy with its surroundings) and so the lithostatic pressure decreases. This means that the parcel of rising rock crosses the solidus, and so at this point the thermal vibration of the molecules is no longer counteracted by the lithostatic pressure and the rock begins to partially melt.
Energy comes from the Sun, plants and animals that we eat, to provide us with nutrients we need for energy.
Answer:
The half-life of the isotope is 2 hours
Explanation:
The Geiger counter is a device that is used for the detection and measurement of all types of radiation( that is alpha, beta and gamma radiation).
Initially, the Geiger counter also known as the Geiger Muller tube registers 160 counts per minutes when placed near a radioactive isotope. After eight hours, the counter registers 10 counts per minute, this reduced number of counts means that n half lives has elapsed.
10 counts per minute = 1/16 of 160 counts per minutes.
Therefore 1/16 = 1/2⁴, comparing 1/2⁴ with
where n is the number of elapsed half lives, n = 4. This means that 4 half lives has elapsed after 8 hours.
Therefore one half life of the isotope = 8/4 = 2 hours.
Answer: It eventually loses its stamina, and would come to a stop.
Explanation: