Answer:
3.39 * 10^-41 m
Explanation:
Given that:
speed of airplane = 880 km/hr
Mass of airplane = 80000 kg
Debroglie wavelength (λ) = h / mv
h = planck's constant = 6.626 * 10^-34
; mass = 80000kg
Velocity = 880km/hr to convert to m/s
Velocity = (880 * 1000m) / 3600 =244.44 m / s
λ = (6.626 * 10^-34) /(80000*244.44)
λ = (6.626 * 10^-34) / 19555200
λ = 3.3889 *10^-41
λ = 3.39 * 10^-41 m
1. The hypothesis for this is experiment is that the 50:50 of methanol-water mixture will not turn to solid when the temperature reaches to -40°C.
2. The procedure for this is measuring equal volumes of water and methanol using the graduated cylinder. You can measure 100 mL of water and 100 mL of methanol using the graduated cylinder. Then, mix them in the beaker. Next, measure 200 mL of water, and another 200 mL of methanol. Don't mix them. Also, make a 60:40 mixture by measuring 120 mL of water and 80 mL of methanol, then mix them together. Place them all in the refrigerator at the same time. Record the time when they would freeze to solid.
3. The controls for this experiment are the 200 mL water alone, and the 200 mL methanol alone.
4. The independent variable in here is the time, while the dependent variable is the temperature of the mixtures.
5. If the hypothesis turns out to be true, then all the mixtures prepared should freeze and become solid after a certain period of time, with the exception of the 50:50 mixture. The 50:50 mixture should still remain as a liquid even when left overnight.
Answer:
I think that this would be an example of erosion
Hey there!
Solid Sodium and water will react spontaneously and release energy. This is based on the reactivity series. Sodium is a highly reactive metal and hence, it is placed at the top of the reactivity series. This is because it loses its outermost electron very readily. When it comes in contact with water, it reacts with it violently to form sodium hydroxide and hydrogen gas. This reaction is exothermic and hence, accompanied with a release of energy. Gold lies at the bottom of the reactivity series as it is very stable and does not give away its outermost electrons easily. Therefore, when it comes in contact with water, there is no reaction and no release of energy.
I'd say the answer is D because they need to intake and keep as much water as possible.
