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.
ScanSolve AI Answer
Step 1: Determine the initial and final water levels for Question 5. The first measuring cylinder shows the water level before the rock was added. The water level is at 14 mL. The second measuring cylinder shows the water level after the rock was added. The water level is at 17 mL. Step 2: Calculate the difference in water levels for Question 5. The difference in water level is the final volume minus the initial volume. Difference = 17 mL - 14 mL = 3 mL This difference represents the volume of the rock. Step 3: Select the correct option for Question 5. The calculated difference is 3 mL. Comparing this to the given options: A. 3 mL B. 11 mL C. 14 mL D. 25 mL The correct option is A. The final answer is A. 3mL. Step 4: Identify instruments for measuring size and mass for Question 6. To measure the size (dimensions like length, width, height) of a block of wood, a ruler or a metre stick is needed. To measure the mass of a block of wood, a balance (like a triple beam balance or electronic balance) is needed. Step 5: Select the correct option for Question 6. Considering the required instruments: A. ruler and a balance. (Ruler for size, balance for mass) B. thermometer and a metre stick. (Thermometer measures temperature, not mass) C. watch with a second hand and a ruler. (Watch measures time, not mass) D. measuring cylinder and a thermometer. (Measuring cylinder measures liquid volume, thermometer measures temperature) The correct option is A. The final answer is A. ruler and a balance.. Step 6: Recall the formula for density for Question 7. Density () is defined as mass (m) per unit volume (V). = (m)/(V) Step 7: Identify the measurements required for density for Question 7. Based on the formula, to measure the density of an object, you need to measure its mass and its volume. Step 8: Select the correct option for Question 7. Considering the required measurements: A. Mass and length. (Length alone is not sufficient for volume) B. Mass and volume. (These are the two quantities directly used in the density formula) C. Volume and length. (Mass is missing) D. Temperature and volume. (Temperature is not a primary measurement for density, though density can be temperature-dependent) The correct option is B. The final answer is B. Mass and volume.