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 your questions: 8. b) Three factors that can increase the strength of a U-shaped soft iron core electromagnet are: • Increasing the current flowing through the coil. • Increasing the number of turns in the coil. • Increasing the cross-sectional area or permeability of the soft iron core. 17. a) i) To determine the height on a water barometer: Step 1: State the principle that atmospheric pressure is constant. The atmospheric pressure (P_atm) is the same for both barometers. P_atm = _mercury g h_mercury = _water g h_water Step 2: Simplify the equation by canceling g. _mercury h_mercury = _water h_water Step 3: Identify the given values. h_mercury = 67 cm = 0.67 m _water = 1000 kg/m^3 _mercury = 13600 kg/m^3 Step 4: Substitute the values and solve for h_water. 13600 kg/m^3 × 0.67 m = 1000 kg/m^3 × h_water h_water = 13600 kg/m^3 × 0.67 m1000 kg/m^3 h_water = (9112)/(1000) m h_water = 9.112 m ii) A force pump must be used instead of a lift pump to raise water from a deep well over 10 m because a lift pump relies on atmospheric pressure, which can only push water up to a maximum height of approximately 10.3 m (at sea level). A force pump, however, can exert a positive pressure to push water to much greater heights, overcoming this atmospheric pressure limit. That's 2 down. 3 left today — send the next one.