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Question1
A dolphin located in sea water at a temperature of 26C emits a sound directed toward the bottom of the ocean 157 m below. How much time passes by it hears an echo? Assume the speed of sound in sea water is 1530 m/s at this temperature.
Response in units of s
Question2
A conducting circular loop placed in a uniform magnetic field B=0.020 T with its plane vertical to the field. Somehow the radius of loop starts shrinking at a constant rate of 1.0 mm/sec. Find out the induced emf in the loop at an instant when the radius is 2 cm.
Question3
A bus travels 290 km south along a straight path with an average velocity of 86 km/h to the south. The bus stops for 26 min, then it travels 230 km south with the average velocity of 66 km/h to the south. How long does the total trip last?
Respond in units of
The magnetic flux through a 50-cm-long solenoid that has 500 turns of radius 3.0 cm is 3.0 × 10-2 Wb. Calculate the current through the solenoid
A meter stick is found to balance at the 49.7-cm mark when placed on a fulcrum. What is the mass of the meter stick
A fisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of water. It takes a time of 2.30s for the boat to travel from its highest point to its lowest, a total distance of 0...
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A magnetic field and an electric field, in separate regions of space, have strengths of 1.25 T and 1.25 N/C, respectively. What is the energy density of the magnetic field
A rectangular loop with sides of lengtha=1.10cm andb=4.10cm is placed near a wire that carries a currenti(t)=3.14 + 1.04t2, where the current is in amperes and time is in seconds. The distance from the straight wire to the closest side of the loop..
A parallel-plate capacitor C is charged up to a potential V with a charge of magnitude Q on each plate. What is the potential difference across the plates in terms of V
A 2.50g ice flake is free from the edge of a hemispherical bowl whose radius r is 31 cm. The flake-bowl contact is frictionless. What is the speed of the flake when it reaches the bottom of the bowl?
What is the longest wavelength of light that can be absorbed by a hydrogen atom that is initially in the first excited state
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