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A 5-kg rock is thrown upward with a force of 150 N at a location where the local gravitational acceleration is 9.79 m/s2. Determine the acceleration of the rock, in m/s2.
A viral preperation was inactivated in a chemical bath. The inactivation process was found to be first order in virus concentration, and at the beginning of the experiment 2.0% of the virus has found to be inactivated per minute.
Suppose that we have a mixture of N2 (g) and O2 (g) of unknown composition whose total pressure is 385 torr. If all the oxygen as is removed from the mixture by reaction with phosphorus
a fire hose exerts a force on the person holding it. this is because the water accelerates as it goes from the hose
The best leaper in the animal kingdom is the puma, which can jump to a height of 3.7 m when leaving the ground at an angle of 45°. With what speed must the animal leave the ground to reach that height
The block is acted upon by its weight w=200lb, a horizontal force Q=600 lb and pressure P exerted by the inclined plane. The resultant R of these forces is up and parallel to the incline there by sliding the block up it. Establish P and R.
When a 2.50 kg object is hung vertically on a certain light spring described by hooke's law, the spring stretches 2.76 cm. What's the force constant of the spring?
One mole of dry air has an initial state of T = 293 K and p = 900 hPa. It undergoes a process in which its volume becomes four times its initial volume and its pressure decreases to 450 hPa. If air is considered an ideal gas and if the process obeys ..
A suspension bridge is 60.0 m above the level base of a gorge. A stone is thrown or dropped from the bridge. Neglect air resistance. Let g = 10.0 m/s2. how long does it take for it to fall to the base of the gorge
A bucket filled with water has a mass of 79 kilogram and is attached to a rope that is wound around a .065 meter radius cylinder. Find what minimum force directed perpendicular to the crank handle is required to raise the bucket
a rugby player runs with the ball directly toward his opponents goal along the positive direction of an x axis. he can
A body of uniform of cross sectional area A = 1 cm^2 and mass density 0.8 g/cm3 floats in water. At equilibrium it displaces a volume 0.8 cm3. Find the period of small oscillations for the body
a billiard ball of mas 0.3kg moves with a speed of 5ms and collides elastically with a ball of mass 0.2kg moving in the
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