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A 41.7kg boy and a 56.4kg girl are on the surface of a frozen lake, 14.0m apart. Using a rope, the boy exerts a horizontal 4.50N force on the girl, pulling her toward him. Calculate the magnitude of the boy's acceleration.
A soccer ball is kicked with an initial horizontal velocity of 18 m/s and an initial vertical velocity of 13 m/s, What is the initial speed of the ball, What is the initial angle of the ball with respect to the ground
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.19 x 104 m/s, What is the orbital speed of the second satellite
Two slits are illuminated by a 390 nm light.The angle between the zeroth-order bright band at the center of the screen, how far apart is this bright band from the central peak
Two 2.30 cm x 2.30 cm plates that form a parallel-plate capacitor are charged to +- 0.714nC. Part A What is the potential difference across the capacitor if the spacing between the plates is 1.00mm? Part B What is the potential difference across t..
An electric motor is rated to have a maximum power output of 0.68 hp. how fast (i.e., at what speed) can it lift the crate
An airplane has a mass of 20,000 kg and takes off under the control of a constant net force of 30,000 N. What is the net force that acts on the plane's 73 kg pilot.
A particle moves with constant acceleration a. The expression v1+at represents the particle's velocity at what instant in time.
it takes 100 minutes for a middle-aged physics professor to ride his bicycle up the road to Alpe d'Huez in France, What is the bicyclists average power output
At a particular instant an electron is traveling in the +y direction, with speed 7105 m/s. find the magnitude of the magnetic force on the electron
A 95.0-kg climber is scaling the vertical wall of a mountain. His safety rope is made of a material that, How much is the rope stretched when it breaks his fall and momentarily brings him to rest
Why is surface wind always directed at some angle across sea-level isobars toward lower pressure? Why is the surface wind directed across the sea-level isobars at a greater angle in Madison than over the middle of Lake Michigan.
A current of 1mA is passed through a slab of semiconductor material of thickness 1mm with a magnetic field of 0.1 T applied in the perpendicular direction. Estimate the band gap energy for the material
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