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 solutions to the questions: 9) i) When currents flow in opposite directions in parallel conductors, the conductors repel each other. • For conductor A, the force F will be directed to the left (away from B). • For conductor B, the force F will be directed to the right (away from A). [scale=0.8] % Conductor A (0,0) circle (0.5); at (0,0) ; % Current out of page at (0,1) A; % Conductor B (4,0) circle (0.5); at (4,0) ; % Current into page at (4,1) B; % Magnetic field lines (simplified representation for repulsion) [->] (2, -2) arc (-90:90:2 and 2); [->] (2, 2) arc (90:270:2 and 2); % Forces [->, thick, red] (0,0) -- (-1,0); [red] at (-1.3,0) F; [->, thick, red] (4,0) -- (5,0); [red] at (5.3,0) F; 10) When waves travel from a deep to a shallow medium, their speed decreases, and their wavelength decreases. If they approach the boundary at an angle, they also refract (bend) towards the normal. The wave crests in the shallow medium will be closer together and bent. [scale=0.8] % Deep medium waves in -2,-1,0,1,2 (, -2) -- (, 2); [->] (0.5, 0) -- (1.5, 0); % Direction of propagation at (0, -2.5) Deep; % Boundary [thick] (2,-2) -- (4,2); at (4.5, 2.5) Shallow; % Shallow medium waves (refracted and shorter wavelength) (2.2, -1.8) -- (3.2, 0.2); (2.4, -1.4) -- (3.4, 0.6); (2.6, -1.0) -- (3.6, 1.0); (2.8, -0.6) -- (3.8, 1.4); (3.0, -0.2) -- (4.0, 1.8); Radioactive decay question (unnumbered): Step 1: Convert the total time to minutes. Total time = 1 hour = 60 minutes Step 2: Calculate the number of half-lives (n). n = Total timeHalf-life = 60 minutes20 minutes = 3 Step 3: Calculate the mass remaining after 3 half-lives. Mass remaining = Initial mass × ((1)/(2))^n Mass remaining = 20 g × ((1)/(2))^3 Mass remaining = 20 g × (1)/(8) Mass remaining = 2.5 g Step 4: Calculate the mass decayed. Mass decayed = Initial mass - Mass remaining Mass decayed = 20 g - 2.5 g Mass decayed = 17.5 g 11) Two dangers of X-rays are: • They are ionizing radiation and can cause cell damage or mutations in DNA, leading to cancer. • Excessive exposure can cause radiation sickness, leading to symptoms like nausea, vomiting, hair loss, and fatigue. That's 2 down. 3 left today — send the next one.