False ..............................................
Answer:
0.5 atm is equal to 380mmHg.
Explanation:
For every 1 atm, it is equal to 760mmHg.
Therefore, 0.5 atm is 760/2, which is 380mmHg.
Answer:
1350J
Explanation:
Heat energy = ?
Mass = 30.0g
Specific heat capacity (c) = 0.90J/g°C
Initial temperature (T1) = 25°C
Final temperature (T2) = 75°C
Heat energy (Q) = mc∇T
Q = heat energy
M = mass of the substance
C = specific heat capacity of the substance
∇T = change in temperature of the substance = T2 - T1
Q = mc∇T
Q = 30 × 0.90 × (75 - 25)
Q = 27 × 50
Q = 1350J
The heat energy required to raise the temperature of the metal from 25°C to 75°C is 1350J
Answer:
Hot material near Earth's surface is more dense and sinks, and when it cools, it becomes less dense and rises.
Explanation:
Convection is a process by which less dense material rises and more dense material sinks near Earth's surface. Water, air, rocks and other materials expands when temperature rises and they become less dense. When the water is heated it becomes vapors and carries away thermal energy from the water.
