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
Here are the answers to Question 4 based on the image provided: Question 4 - THERMAL PHYSICS a) Specific heat capacity* is the amount of heat energy required to raise the temperature of 1 kg of a substance by 1 Kelvin (or 1 degree Celsius). b) To determine the specific heat capacity of a metal block using the electrical method: 1. Measure the mass (m) of the metal block. 2. Insert an electric heater and a thermometer into the block. 3. Insulate the block to minimize heat loss. 4. Record the initial temperature (T_1). 5. Switch on the heater for a measured time (t), recording the voltage (V) and current (I). 6. Switch off the heater and record the highest temperature (T_2) reached. 7. Calculate heat supplied: Q_supplied = VIt. 8. Calculate heat gained by block: Q_gained = mc(T_2 - T_1). 9. Equate heat supplied to heat gained (VIt = mc(T_2 - T_1)) and solve for c. c) Calculate the heat supplied. Step 1: Identify the given values. Mass m = 2.0 kg Initial temperature T_1 = 25^ Final temperature T_2 = 85^ Specific heat capacity c = 900 J kg^-1 K^-1 Change in temperature T = T_2 - T_1 = 85^ - 25^ = 60^ = 60 K. Step 2: Use the formula for heat supplied. Q = mc T Step 3: Substitute the values and calculate. Q = (2.0 kg) × (900 J kg^-1 K^-1) × (60 K) Q = 108000 J The heat supplied is 108000 J. d) Sea breeze* is a local wind that blows from the sea towards the land during the day. This occurs because land heats up faster than the sea, causing the air above the land to rise and create a low-pressure area. Cooler, denser air from over the sea (a high-pressure area) then flows in to replace the rising air, forming the breeze. That's 3 down. 2 left today — send the next one.