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Bob is driving from Miami to Philadelphia to go see the 8:20pm Eagles/Giants game with his cousin Scott. At the speed he is driving he computes that the trip will take him 1 hour, so he decides to leave home at around 7:20pm. When he tells his departure time to Scott, Scott tells him that at that velocity, he’ll miss the first half, since he’ll arrive not at 8:20pm however at 9:20pm. What’s the velocity at which Bob is driving his car? What’s the distance among the two cities in Bob’s reference frame and in Scott’s reference frame?
a very long coaxial cable consists of a solid cylindrical inner conductor of radius 4mm surrounded by an outer
Two metal disks, one with radius R_1 = 2.55 cm and mass M_1 = 0.850 kg and the other with radius R_2 = 4.90 cm and mass M_2 = 1.57 kg, What is the total moment of inertia of the two disks
A watertight car is submerged under water. What force is required to open a door of area 1.25 m2 if the average depth of water at the door is 1.92 m
A 4.30 kg block is pushed along the ceiling with an constant applied force of F = 71.5 N that acts at an angle ? = 65° with the horizontal, as in the figure below. The block accelerates to the right at 6.36 m/s2.
what is the distance of closest approach of the two particles? assume that the gold nucleus remains stationary and that
A projectile is fired with an initial speed of 164 m/s. Find the angle of projection such that the maximum height of the projectile is equal to 0.5 times its horizontal range
Calculate the escape velocity for a planet that has twice the mass of Earth and is half the size of Earth
a sports photographer has a 150 mm focal length lens on his camera.the photographer wants to photograph a sprinter
Find what is the length of a one-dimensional box in which an electron in the n = 1 state has the same energy as a photon with a wavelength of 400 nm
A Ball Rolling Uphill. A bowling ball rolls without slippingup a ramp that slopes upward at an angle beta to the horizontal. What is the acceleration of the center of mass of the ball
The length of the mercury column at the ice point and steam point are 5.0 cm and 40.0cm respectively. What is the temperature of the liquid
A wooden block slides directly down an inclined plane, at a constant velocity of 6.0 m/s. How large is the coefficient of kinetic friction, if the plane makes an angle of 25 degrees with the horizontal?
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