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A cube with a side of 15 cm floats at the surface between water and oil. The oil has a density of 810 kg/m3. If the cube floats so that it is 52% in water and 48 % in the oil, what is the mass of the cube and what is the buoyant force on the cube.
A projectile fired from a gun has initial horizontal and vertical components of velocity equal to 30 m/s and 40 m/s, respectively. At what angle is the projectile fired
A helium-neon laser of the type often found in physics laboratories has a beam power of 4.00 mW at a wavelength of 633 nm. Calculate the intensity of the focused beam
A spring with spring constant k stands vertically, and a massm is placed on top of it. The mass is gradually lowered toits equilibrium position. How many times does the mass oscillate back and forthbefore coming to rest
A student ofmass m standsat one end of a long log of length l and mass M, which is floating on the campuspond at right angles tothe shore. Assume there is no friction between the logand the water.
A high-speed photograph of a club hitting a golf ball, find the average force exerted on the ball by the club
A Cepheid variable in a nearby galaxy looks 106 times fainter than an identical Cepheid in the Milky Way. How far away is the nearby galaxy
find the total mechanical energy of a mass-spring system with m 1.30kg and maximum speed 0.750
A small rigid object carries positive and negative 4.00 nC charges. It is oriented so that the positive charge has coordinates, Find the electric dipole moment of the object
When the afternoon Sun reaches an angle of 30° above the horizon, sunlight ceases to clarify any part of the bottom of the tank. How deep is the tank.
What is the period of oscillation of the scale? State your reply numerically in seconds.
A block of mass m is attached to a cord that is wrapped around the rim of a flywheel of radius R and hangs vertically, what is the rotational inertia of the fly wheel
To determine the center of mass of her body, a student lies on aplank of mass m=10 kg. The plank is supported by two scales at itsends. The distance between the scales is 2.5 meters. The left scalereads 339 N and the right reads 171 N.
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