There are two main types of physical weathering: Freeze-thaw occurs when water continually seeps into cracks, freezes and expands, eventually breaking the rock apart. Exfoliation occurs as cracks develop parallel to the land surface a consequence of the reduction in pressure during uplift and erosion.
Freezing point is the temperature at which a substance undergoes a phase transition from liquid to solid state. Water converts from liquid state to solid ice at a temperature of 
.
Mass is the amount of matter contained in a substance. The SI unit of mass is kilogram. 1 kilogram is equal to 1000 g. One kilogram is defined as the mass of one cubic decimeter of water at the freezing point of water.
The answer would be a metal, most likely copper. hope this helped (:
Answer: 211 kPa
Explanation:
Given that,
Original pressure of gas (P1) = 125 kPa
Original volume of cylinder (V1) = 760 cm3
New pressure of gas (P2) = ?
New volume of cylinder (V2) = 450 cm3
Since pressure and volume are given while temperature is held constant, apply the formula for Boyle's law
P1V1= P2V2
125 kPa x 760 cm3= P2 x 450 cm3
95000 kPa•cm3 = 450 cm3•P2
Divide both sides by 450 cm3
95000 kPa•cm3/450 cm3 = 450 cm3•P2/450 cm3
211.1 kPa = P2
[Round the value of P2 to 3 significant numbers. Hence, P2 becomes 211 kPa]
Thus, the new pressure within the cylinder is 211 kPa
