This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
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Here are the answers to the questions from the image: C. Match the following: 1. Pressure → b. P 2. Barometer → f. Atmospheric pressure 3. Weight → d. Gravitational force 4. Torricelli barometer → e. Simple barometer 5. Increased pressure → c. Decreased contact area 6. S.I. Unit → a. Pascal D. Answer the following questions: 1. The SI unit of pressure is the Pascal (Pa). 2. Pressure depends on two main factors: The force* applied. The area* over which the force is distributed. 3. Force is a push or pull that can cause an object to accelerate or deform. It is measured in Newtons (N). Pressure is the force applied perpendicular to a surface per unit area. It is measured in Pascals (Pa). 4. The pressure exerted by a liquid increases with the depth of the liquid column. 5. Step 1: Convert the area from cm^2 to m^2. A = 180 cm^2 × (1 m100 cm)^2 = 180 × (1)/(10000) m^2 = 0.018 m^2 Step 2: Calculate the pressure using the formula P = (F)/(A). P = 10 N0.018 m^2 P ≈ 555.56 Pa The pressure exerted by the pin is 555.56 Pa. 6. Step 1: Assume the person's weight (force) is 120 N. Calculate the total area of contact when standing on two feet. Area under one foot = 180 cm^2 Total area (A) = 2 × 180 cm^2 = 360 cm^2 Step 2: Convert the total area from cm^2 to m^2. A = 360 cm^2 × (1 m100 cm)^2 = 360 × (1)/(10000) m^2 = 0.036 m^2 Step 3: Calculate the pressure using the formula P = (F)/(A). P = 120 N0.036 m^2 P ≈ 3333.33 Pa The pressure exerted on the ground by the person is 3333.33 Pa. 7. Step 1: Use the formula for pressure P = (F)/(A). P = 23 N46 m^2 P = 0.5 Pa The pressure is 0.5 Pa. 8. Atmospheric pressure decreases with altitude because as you go higher, there is less air above you. This means there are fewer air molecules to exert gravitational force, resulting in a lower weight of the air column and thus lower pressure. HOTS An inflated balloon bursts when pushed with a pointed pencil tip because the small contact area of the tip concentrates the force into a very high pressure, exceeding the balloon's strength. When pushed with a finger, even with greater force, the larger contact area distributes the force over a wider region, resulting in a much lower pressure that the balloon can withstand. PROJECT WORK This is a project activity. You need to collect pictures and create a collage, writing two sentences for each picture. Life Skill To fill the second container with an equal amount of water from the first, you would need a measuring cup to accurately transfer the water. Alternatively, if both containers are identical in shape and size, you could pour water from the first into the second until the water levels in both containers are equal. Fun Time This is a project activity. You need to make and explain a Torricelli Barometer on chart paper. Last free one today — make it count tomorrow, or type /upgrade for unlimited.