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Using a wheel and axle machine, a force of 100 Newton applied to the rim of a wheel can lift a load of 80 kilogram. The diameters of the wheel and axle are 1 meter and 80 centimeter correspondingly. Obtain the actual mechanical advantage and the efficiency of the machine.
A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 34.3m/s2. Find the maximum height ymax reached by the rocket
The owner of a van installs a rear-window lens that has a focal length of -0.295m. Determine how tall is the man
Slides along an x axis on a frictionless floor
A plane traveling at 432km/h flies in a circle with a radius of 3820m. Calculate how long it takes to go once around the circle
two conductors having net charges of 16.0 microc and -16.0 microc have a potential difference of 16.0 v between them. a
A pitcher throws a curveball that reaches the catcher in 0.59 s. The ball curves because it is spinning at an average angular velocity of 380 rev/min on its way to the catcher's mitt. What is the angular displacement of the baseball as it travels ..
The position of the front bumper of a test car under microprocessor control is given by x(t) = 2.07 m + (4.50 m/s2)t2 - (0.100 m/s6)t6. Find its position at the first and second instants when the car has zero velocity
Assume the following waves are propagating in air. Calculate the wavelength for gamma rays of frequency f_1= 7.40×1021 Hz
The dielectric strength of air is 3.0x106 V/m, and that of neoprene rubber is 1.2x107 V/m. A certainair-gap, parallel-plate capacitor can store no more than 0.060 J of electrical energy before breaking down.
A geologist finds that a Moon rock whose mass is 10.15 kg has an apparent mass of 5.68 kg when submerged in water. What is the density of the rock
the warm source of a carnot cycle has a temperature of 100 ?c while the cold source consists of melting ice.when the
In a Certain Organic molecule, the nuclei of two carbon atoms are separated by a distance of 0.25 nm. What is the magnitude of the electric force between them
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