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Hey, I was just looking for some help, if you or anyone could help me review over this draft of my assignment. I've put a lot of time into it. I would really someone to pre-review before submitting it. thx so much.

Week 3: Homework for chapter 5, 24, 25 #1: Newtons are the unit of measurement for forces. a) What are the units for pressure in terms of Newtons? The SI unit of pressure is the Newton per square meter (Nlm2) b) How is a pressure different from a force? Force is a push or a pull and is the cause of acceleration. Pressure is the amount of force per unit of area. The smaller the area supporting a given force, the greater the pressure on that surface. #2: How does the water pressure in a small pond compare to the water pressure in a huge lake at 1 m depth for both? The pressure will stay the same #3: Thinking about how the buoyant force changes with depth, why does the buoyant force act upward on an object submerged in water? (This relationship is summarized in my lecture) The pressure upward on the deeper bottom is greater than the downward pressure on the top. #4: By how much does the density of air increase when it is compressed to half its volume? It doubles #5: What happens to the pressure in all parts of a conned fluid when the pressure in one part is increased? (Pascal's Principle) The pressure everywhere increases by the same amount #6: Due to their shape, air moves faster over the tops of peaked roofs, convertible tops, and airplane wings. a) How does the faster air movement change air pressure? Using Bernoulli's theorem increasing velocity decreases pressure. b) How does this change in air pressure result in lift? Higher the changes, higher the lift force #7: a) which will hurt more- being stepped on by a ZOO-lb man wearing loafers or being stepped on by a 1 OEI-lb woman wearing high heels? The woman wearing heals b) Why? The man's weight is just more distributed threw out his body, but as for the woman a large amount of her weight is concentrated imo each of her heels, which raises the pressure in a small area. #8: In a hydraulic arrangement like the one shown below, the larger side of the piston has an area that is 100 times larger than the area of the smaller piston. The strong man is pressing down on the larger side, trying to lift the 10-kg weight that is stilling atop the smaller piston. Why will he have a difcult time moving the very small weight? He will find it to be very difficult to raise load by applying force on larger side area because force required is very high. #9: Ifthe positions are reversed, and the strong man is pressing on the small piston with the weight on the large piston, why will he have an easier time lifting the weight? In case of smaller sider force required is small so it will be easy to lift the load by applying force on smaller side. #10: The salinity of the ocean varies from one place to another. a) What two factors lead to an increase in salinity? Evaporation of ocean water Formation of sea icelglaciers b) What two factors lead to a decrease in salinity? The inflow of river water and rainfall Melting of glaciers #11: Why do waves become taller as they enter shallow water? This is explained in my lecture. In shallower water, the waves circular motion attens, friction slows the wave, and oncoming waves bunch up becoming higher and steeper. #1 2: When do the highest tides occur: a) During a spring tide or during a neap tide? During the spring tide b) How are the moon and sun positioned at this time? (Are they aligned? At right angles to each other?) Aligned in a straight line c) Why do the positions of the sun and moon cause such high tides at this position? When sun , moon came in Same side with respect to earth then gravitational force due to sun and gravitational force due to moon works in same direction and Mnet force becomes very high which causes maximum height tide. #13: What does the angle at which sunlight strikes Earth have to do with the temperature and polar regions? The lower angle in the sky spreads light over a larger area, reducing the temperature. #14: What does Earth's tilt have to do with the change of seasons? Earth's seasons are caused by the tilt of its rotation axis, which is why the seasons are the opposite in the two hemispheres. The tilt of the axis causes sunlight to fall differently on Earth at different times of the years. #15: Explain why your ears pop when you ascend to higher altitudes in terms of air pressure. The pressure outside decreases when pressure in ear stay the same. In other words, air pressure is lower at higher altitudes. #16: Why does warm air rise and cool air sink? (Think about density) Warm air rises and cold air sinks because of the uneven heating on the earth. Also, hot air rises because it is less dense than the surrounding air. #17: Explain what a convection cycle is and how it is generated. Earth's surface is heated unequally. Some areas absorb solar radiation better than others, so they heat up faster. The air that touches these "hot spots" becomes warmer than the air around it and it rises, expands, and cools. This rising and sinking in a circulatory motion makes a convection cycle. #18: What is the difference between humidity and relative humidity? The difference between humidity and relative humidity, being that humidity is that humidity is the amount of water vapor in the air, and relative humidity is the amount of water vapor in the air compared to the maximum amount that the air can hold. #19: Briefly describe how lightning develops within clouds. In the initial stages of development, air acts as an insulator between the positive and negative charges in the cloud and between the cloud and the ground; however, when the difference in charges becomes too great, this insulating capacity of the air brakes down and there is a rapid discharge of electricity resulting in lightning