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A block of wood floats in water with 0.64 of its volume submerged. When placed in oil, the submerged fraction of the volume is 0.88. Find the density of the wood. Find the density of the oil.
At its highest temperature, a space heater has a resistance of 19.5 ohm, find the average power output of the space heater
An assistant standing on the level ground 150 m downrange from the launch point throws an apple straight up with the minimum initial speed necessary to meet the path of the arrow. Elucidate the initial speed of the apple?
A plane is headed east with an air speed of 272.0 m/s, Find the velocity of the plane relative to the earth
Practical steam engines utilize 450°C steam, which is later exhausted at 250°C. What is the overall efficiency of the two engines
A 1.5V battery has an internal resistance of .5 Ohm. If a light bulb with cold resistance of 10 Ohm is placed in a series with the battery, how much current initially flows in the circuit
A transparent rod 30.0 long is cut flat at one end and rounded to a hemispherical surface of radius 10.0 cm at the other end. What is its apparent depth when viewed from the curved end
M1 is a spherical mass (43.0 kg) at the origin. M2 is also a spherical mass (17.2 kg) and is located on the x-axis at x = 99.0 m. At what value of x would a 16.5-kg mass experience no net gravitational force due to M1 and M2?
In a two-slit experiment a third order bright fringe is observed at an angle of 7.10°. If the wavelength of light is 595 nm, what is the slit separation?
A rock climber stands on top of a 53{\rm m} -high cliff overhanging a pool of water. He throws two stones vertically downward 1.0{\rm s} apart, What is the speed of the first stone as it hits the water
Monochromatic light is normally incident on a diffraction grating that is 1 cm wide and has 10,000 slits. What is the wavelength, in nm, of the incident light
A certain particle has a weight of 34 N at a point where the acceleration due to gravity is 9.80 m/s2. What are the weight and mass of the particle at a point where the acceleration due to gravity is 4.90 m/s2
A 3.5 m long horizontal rod has two forces applied to it. One on the far left corner with a force of 4N at 60 degrees downward, Determine the magnitude and direction of the force in the pin
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