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A piece of wood is 0.600 m long, 0.250 m wide and 0.080 m thick. Its density is 600 kg/m3. What volume of iron (ρI = 7.8 x 103 kg/m3 ) should be fastened underneath it so the wood now floats in water (ρw = 1000 kg/m3 ) with its top even by the water level?
two ants race across a table 52 cm long. one travels at 4.72 cms and the other at 3 cms. when the first one crosses the
four identical metallic objects carry the following charges 1.29 6.21 -4.54 and -9.14c. the objects are brought
At 2432 m above sea level, Mount Olympus in Utah is the highest peak in Olympic Nantional Park. find the angle the pushing force makes with the horizontal
An airplane with a speed of 89.1 m/s is climbing upward at an angle of 48.4 ° with respect to the horizontal. When the plane's altitude is 548 m, the pilot releases a package. Relative to the ground, determine the angle of the velocity vector of the ..
On April 13, 2029 (Friday the 13th!), the asteroid 99942 mi Apophis will pass within 18600 mi of the earth-about 1/13 the distance to the moon! It has a density of 2600 kg/m^3, how much kinetic energy would it deliver
A hook is boxing primarily involves horizontal flexion of the shoulder, while maintaining a constant angle at the below. What is the average speed of the fist during the hook
The x -component of the velocity of an object vibrating along the x - axis obeys the equation vx(t)= (0.445 m/s) sin [(25.4rad/s)t + 0.223]. Find the maximum acceleration of the vibrating object
A component with a 19 Ω resistor is rated for use at power levels not exceeding 11 W. How much current can safely flow throught the component
A 878 kg car has four 11.8 kg wheels. When the car is moving, what fraction of the total kinetic energy of the car is due to rotation of the wheels about their axles
An automible tire is rotated to last for 50,000 miles. Estimate the number of revolutions the tire will make in its lifetime
An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 445 Hz when the train is approaching him and 418 Hz when the train is receding from him. Using these frequencies, h..
What stage of the scientific method would someone be at if they make a prediction that drinking alcohol will make people more violent throughout a sporting event.
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