By the second law of thermodynamics:
Heat can not spontaneously flow from cold regions to hot regions without external work being performed on a system.
Heat transfer is the passage of thermal energy from a hot ( t B = 80° C ) to a colder body ( t A = 40° C ).
Answer: B ) Heat flows from object B to object A.
Answer: 2 mol
Explanation:
- According to the ideal gas law, One mole of an ideal gas at STP (standard temperature and normal pressure) occupies 22.4 liters.
- Using cross multiplication,
1 mol of (O2) → 22.4 L
? → 43.9 L
Therefore, the number of moles of oxygen in 43.9 L = (43.9 × 1)/ 22.4 = 1.96 mol≈ 2 mol..
Answer:
An inclined plane is a machine because it makes horizontal surface that make easier for us to move objects to higher or lower surfaces.
The answer is
14.14 x 10^-2
Ways to conserve water may inclue:
<span>- turning off the water while brushing your teeth.
</span><span>- turning off the water while washing your hand.
</span>- d<span>on’t run the dishwasher or washing machine until it’s full.
- </span><span> use less electricity.
- t</span><span>ake shorter showers
- shower instead of taking a bath
- use a bucket and a sponge to clean your car
- reuse our rain water :)</span>
