Gas, lava, and ______________ are the three general products emitted during a volcanic eruption
Fill in the blank(s) with correct word
pyroclastics, or tephra
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Lens-Maker Formula: A double-convex thin glass lens has equal-magnitude radii of curvature. The focal length of the lens is +37.3 cm and the index of refraction of the glass is 1.52. What is the magnitude of the radius of curvature of each convex surface?
A. 39 cm B. 35 cm C. 31 cm D. 43 cm E. 46 cm
An 800-kHz sinusoidal radio signal is detected at a point 6.6 km from the transmitter tower
The electric field amplitude of the signal at that point is 0.780 V/m. Assume that the signal power is radiated uniformly in all directions and that radio waves incident upon the ground are completely absorbed. What is the amplitude of the magnetic field of the signal at that point? (?0 = 8.85 × 10-12 C2/N ? m2, c = 3.0 × 108 m/s, ?0 = 4? × 10-7 T ? m/A) A) 1.6 nT B) 3.1 nT C) 3.6 nT D) 2.1 nT E) 2.6 nT
A solid sphere of mass 2.5 kg and radius 0.12 m starts from rest at the top of a ramp inclined 15° and rolls to the bottom. The upper end of the ramp is 1.2 m higher than the lower end. What is the linear speed of the sphere when it reaches the bottom of the ramp? (Note: I = 0.4MR2 for a solid sphere, and g = 9.8 m/s2.)
a. 4.1 m/s c. 3.4 m/s b. 4.7 m/s d. 2.4 m/s
The period of a satellite circling planet Nutron is observed to be 84 s when it is in a circular orbit with a radius of 8.0 × 10^6 m. What is the mass of planet Nutron?
a. 6.2 × 10^28 kg b. 5.0 × 10^28 kg c. 5.5 × 10^28 kg d. 4.3 × 10^28 kg e. 3.7 × 10^28 kg