A projectile is launched with speed v at an angle ?, the angle being less than 45º. What other angle would give the same range for this projectile launched at the same speed v?
a. 2? b. 0.5?
c. 90° – ? d. 90º – 0.5?
c
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Intensity: The rate of energy flow per unit area of a sinusoidal electromagnetic wave has an average value of 0.601 W/m2. What is the maximum value of the magnetic field in the wave? (c = 3.00 × 108 m/s, ?0 = 4? × 10-7 T ? m/A, ?0 = 8.85 × 10-12 C2/N ? m2)
A. 7.09 × 10-8 T B. 5.02 × 10-8 T C. 3.55 × 10-8 T D. 9.81 × 10-8 T E. 1.42 × 10-7 T
Diffraction Gratings: When red light illuminates a grating with 7000 lines per centimeter, its second maximum is at 62.4°. What is the wavelength of this light?
Fill in the blank(s) with the appropriate word(s).
The average distance between stars in the neighborhood of the Solar System is about ________.
A. 4 AU B. 4 kiloparsecs C. 4 light-years D. 4 arc seconds
Most of the new star formation in the Galaxy is found in the
A) halo. B) spiral arms. C) bulge. D) Galactic center. E) globular clusters.