A sewing machine needle moves up and down in simple harmonic motion with an amplitude of 1.27 cm and a frequency of 2.55 Hz. What is the maximum speed of the needle?
A) 3.18 cm/s
B) 4.51 cm/s
C) 20.3 cm/s
D) 10.1 cm/s
E) 6.36 cm/s
C
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proportional relationship between a galaxy's distance and that galaxy's receding velocity
A. Gerard de Vaucouleurs |
B. Georges Lemaître |
C. Hubble’s Law |
D. Edwin Hubble |
E. Velocity or Speed |
F. Ho |
Dielectrics: A parallel-plate capacitor with plate separation of 4.0 cm has a plate area of 6.0 × 10-2 m2.What is the capacitance of this capacitor if a dielectric material with a dielectric constant of 2.4 is placed between the plates, completely filling the space? (?0 = 8.85 × 10-12 C2/N ? m2)
A. 3.7 × 10-12 F B. 3.7 × 10-14 F C. 16 × 10-14 F D. 32 × 10-14 F E. 32 × 10-12 F
Radiation pressure: The total electromagnetic power emitted by the sun is 3.8 × 1026 W. What is the radiation pressure it exerts on the perfectly absorbing surface of a satellite near the orbit of Mercury, which is 5.8 × 1010 m from the sun? The radiation strikes the surface of the satellite perpendicular to the surface. (c = 3.0 × 108 m/s)
Fill in the blank(s) with the appropriate word(s).
A definite method for losing weight is
A) exercise. B) reduce Calorie intake. C) maintain a low body temperature. D) none of the above