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a) Explain how a submarine is caused to submerge and surface without the use of its propulsion propeller and fins.
b) Which is heavier, a given volume of ice or the same volume of water? Justify your answer.
When the Sun is directly overhead, a hawk dives toward the ground with a constant velocity of 5.30 m/s at 68.5° below the horizontal
The tension in a string is 20.6 n and its linear density is .649 kg/m. A wave on the string travels in the -x direction. It has amplitude of 3.71 cm and a frequency of 10.6 hz. What are the speed and wavelength of wave.
Both surfaces of a double convex lens have radii of 30.8 cm. what is the index of refraction of the lens material
A hydrogen atom has an angular momentum of 1.055x10^-34 kg.m^2/s. According to the Bohr model, what is the energy (eV) associated with this state
Bob walks up to the crate and begins pushing with 200N of force. What is the magnitude of the frictional force now
The experiment done in lab is repeated, using a ball that has unknown mass m. You plot your data in the form of f?2 versus M/L, calculate the mass m of the ball
A tennis player hits a 1.45 kg tennis ball with a racket of mass 2.5 kg. If he hits the ball with a velocity of 7.5 m/s and then stops, what impulse did he imply on the ball
A high-tension power line composed of aluminum wire with cross-section area 24 x10?6 m2 carries a current of 1100 A. What is the power loss over 50 km of wire
The electric potential inside a conducting sphere is 245V, and a distance d = 32.0cm from the surface of the sphere, obtain the radius of the sphere
A block of mass 5 kg lies on a horizontal table. The block is at rest. The only forces acting on the block are the force due to gravity and the normal force from the table. What is the magnitude of the friction force
an electron is shot directly toward the center of a large metal plate that has surface charge density -1.00 × 10-6 C/m2. how far from the plate must the launch point be
The index of refraction of silicate flint glass for red light is 1.620 and for violet light is 1.660. What is the angular separation between the red and violet components of the spectrum that emerges from the glass
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