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Question: A block A of mass 2kg rests on another block B of mass 8 kg which rests on a horizontal floor. The coefficient of friction between A and B is 0.2 while that between floor and block B is 0.5 When a horizontal force is of 25N is applied on B, what is the force of friction between A and B?
Illustrate what is the maximum vertical displacement that he ball reaches during its trajectory?
The Earth has mass ME and average radius RE. Find an expression for the moment of inertia IE of the Earth on its axis in terms of the given parameters
What will be the lowest possible temperature to which very dry air at T=40 C can be cooled by evaporation. Consider p=1000mb and lv constant and equal to 2.4 x 106 J kg-1.
A hot air balloon is ascending straight up at a constant speed of 6.90 m/s. When the balloon is 13.0 m above the ground, a gun fires a pellet straight up from ground level with an initial speed of 31.0 m/s.
A scuba diver is 32 m below the surface of a lake, where the temperature is 5°C. What is the volume of the bubble right before it breaks the surface
in a poll of 1084 adults it was found that 22 smoked cigarettes in the past week. use 0.05 nificance level to test
A plum is located at coordinates (-9.66 m, 0, 2.67 m). In unit-vector notation, what is the torque about the origin on the plum
An object is found to have a weight in air of 500N. It is then tied to a string connected to a balance and immersed in water (density of water is 1000 kg/m3). The scale now reads 450 N. at last the object is immersed in oil and is found to have a ..
q1. a person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by
A 7.0 kg object undergoes an acceleration of 2.5 m/s2. What is the magnitude of the resultant force acting on it
Jack was exposed to fast neutrons; he received a radiation dose of 300rem on part of his hand, affecting 28.0grams of tissue. How much radiation did Jack receive
calculate the magnitude of the repulsive electric force between two protons packed together in an atomic nucleus, assuming that their separation is fixed at 2.4x10^-15m.
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