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Two rectangular blocks are stacked on a table. The lower block has a mass of 38.6 kg and upper block has a mass of 3.40 kg. The coefficient of kinetic friction among the lower block and the table is 0.260. The coefficient of static friction among the blocks is 0.551. A string is attached to the lower block and an external force −"F is applied horizontally, pulling on the string. (a) What is the maximum force that can be applied to the string without having the upper block slide off? (b) If a force of magnitude 500N is applied, at what angle above the horizontal should it be directed in order for the upper block to remain stationary by respect to the lower block?
Boral is a commercial shielding material consisting of approximately equal parts by weight of boron carbide (B4C) and aluminum compressed to about 95% theoretical density (2.608 g/cm3) and clad with thin sheets of aluminum 0.25 cm thick. The manuf..
What is the effect of thermal insulation on cooling
Consider the conical pendulum, a mass on the end of a string, with the other end of the string fixed to the ceiling. what is the speed (in m/s) of the mass as it swings
A certain system has 6x10^24 degrees of freedom and its internal energy increases by 1%, then what is the increase in the system's entropy
Two pucks, A and B, are on an air hockey table. Puck A is moving with an initial velocity of 5.5m/s Eastward and Puck B is at rest and East of Puck A. Find the final speed of both pucks
A 109-rad dose of radiation is administered to a cancer patient (mass = 73) kg). how much energy is absorbed
The apparatus show in firgure P11.8 was used by Joule tomeasure the mechanical equivalent of heat. what is the increase in tempterature of the water
Influenced by the gravitational pull of a distant star, the velocity of an asteroid changes from from +21.0 km/s to ?17.8 km/s, What is the total change in the asteroid's velocity
an astronaut on a small planet wishes to measure the local value of the free-fall acceleration by timing pulses
A 25-kg child is sitting on the seat of a swing 10 m long. Her father pulls the swing back until the swing makes an angle of 37 degrees with the vertical. The gain in potential energy of the child at this point is?
A car rounds a 230 m -radius curve at 14.5 m/s. If the horizontal force acting on the car is 790 N, what's the car's mass
q1. a music fan at a swimming pool is listening to a radio on a diving platform. the radio is constant frequency when
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