An airplane is flying at a speed of 2.00 102 m/s in level flight at an altitude of 8.00 102 m. A package is to be dropped from the airplane to land on a target on the ground. Ignore air resistance
(a) At what horizontal distance away from the target should the package be released so that it lands on the target?
(b) In what direction relative to the horizontal will the package be traveling when it hits the ground?
(a) 2.56 km (b) 32.1° below the horizontal
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Rotational Dynamics: A 385-g tile hangs from one end of a string that goes over a pulley with a moment of inertia of 0.0125 kg ? m2 and a radius of 15.0 cm. A mass of 710 g hangs from the other end of the string. When the tiles are released, the larger one accelerates downward while the lighter one accelerates upward. The pulley has no friction in its axle and turns without the string slipping. What is the tension in the string on the side of the 710-g tile?
A. 9.77 N B. 6.87 N C. 5.59 N D. 4.41 N E. 3.68 N
A single slit is illuminated at normal incidence with a parallel beam of light having a wavelength of 411 nm. The entire central band of the diffraction pattern is observed at ±90°
The illumination is now replaced by a nonrelativistic beam of electrons, each having a kinetic energy of 980 eV. When this beam hits the slit at normal incidence, at what angle will the first minimum of the electron diffraction pattern occur? (h = 6.626 × 10-34 J • s, mel = 9.11 × 10-31 kg, 1 eV = 1.60 × 10-19 J) A) 0.095 mrad B) 0.071 mrad C) 0.046 mrad D) 0.12 mrad E) 0.14 mrad
By convention, the direction of current in a circuit is
A) from the positive terminal of a source to the negative terminal. B) the direction in which positive charge flows. C) both of these D) neither of these
The ________ tides occur when there is little tidal variation, near first and third quarter moons
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