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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Hubble's law requires calibration with distances measured by standard candle techniques. Which standard candle technique is best for measuring the distances of very distant galaxies?
What will be an ideal response?
The specific heat of an object is:
a. its heat capacity divided by its mass. b. its mass divided by its heat capacity. c. the same as its heat capacity. d. its heat capacity multiplied by its mass. e. its temperature multiplied by the atmospheric pressure.
Total Internal Reflection: A thick slab of plastic lies at the bottom of a tank filled with water having an index of refraction of 1.33. A narrow laser beam is shone directly downward through the water on the plastic. You then gradually rotate the laser, thereby increasing the angle with respect to the normal that it strikes the plastic. You carefully note that at the instant the beam makes an angle of 66.5° with the normal in the water, no light enters the plastic, but it did enter for angles smaller than that. What is the speed of light in the plastic slab? (c = 3.00 × 108 m/s)
Fill in the blank(s) with the appropriate word(s).
________ optics deform the shape of the mirror to compensate for the turbulence in the atmosphere and yield a close to diffraction-limited image
A) Collimating B) Parabolic C) Adaptive D) Coherent E) CCD